Southwest Power Pool
FERC Electric Tariff
Fourth Revised Volume No. 1
OPEN ACCESS
TRANSMISSION TARIFF
FOR SERVICE OFFERED BY
SOUTHWEST POWER POOL
*** DRAFT 11/1108/04 ***
Issued by: L. Patrick Bourne, Manager,
Transmission and Regulatory Policy
Issued on: October 27, 2000 Effective: November 1, 2000
Southwest Power PoolOriginal Sheet No. 1
FERC Electric Tariff
Fourth Revised Volume No. 1
TABLE OF CONTENTS
I.COMMON SERVICE PROVISIONS...... 7
1Definitions...... 7
1.1Ancillary Services...... 7
1.2Annual Transmission Cost...... 7
1.3Application...... 7
1.3aAttachment Facilities...... 7
1.4Commission...... 7
1.5Completed Application...... 7
1.6Control Area...... 7
1.7Curtailment...... 8
1.8Delivering Party...... 8
1.9Designated Agent...... 8
1.10Direct Assignment Facilities...... 8
1.10aEffective Date...... 8
1.11Eligible Customer...... 9
1.12Facilities Study...... 9
1.12aFeasibility Study...... 10
1.12bFederal Power...... 10
1.13Firm Point-To-Point Transmission Service...... 10
1.13aGeneration Interconnection Customer...... 10
1.13bGeneration Interconnection Request...... 10
1.14Good Utility Practice...... 10
1.14aGrandfathered Agreements or Transactions...... 11
1.15Interruption...... 11
1.16Load Ratio Share...... 12
1.17Load Shedding...... 12
1.18Long-Term Firm Point-To-Point Transmission Service...... 12
1.18aMember...... 12
1.19Native Load Customers...... 12
1.20Network Customer...... 12
1.21Network Integration Transmission Service...... 12
1.22Network Load...... 13
1.23Network Operating Agreement...... 13
1.24Reserved...... 13
1.25Network Resource...... 13
1.26Network Upgrades...... 13
1.27Non-Firm Point-To-Point Transmission Service...... 14
1.28Open Access Same-Time Information System (OASIS)...... 14
1.29Part I...... 14
1.30Part II...... 14
1.31Part III...... 14
1.31aPart IV...... 14
1.32Parties...... 14
1.33Point(s) of Delivery...... 15
1.34Point(s) of Receipt...... 15
1.35Point-To-Point Transmission Service...... 15
1.36Power Purchaser...... 15
1.37Receiving Party...... 15
1.38Regional Transmission Group (RTG)...... 15
1.39Reserved Capacity...... 16
1.40Service Agreement...... 16
1.41Service Commencement Date...... 16
Issued by: L. Patrick Bourne, Manager,
Transmission and Regulatory Policy
Issued on: October 27, 2000Effective: November 1, 2000
Southwest Power PoolOriginal Sheet No. 2
FERC Electric Tariff
Fourth Revised Volume No. 1
1.42Short-Term Firm Point-To-Point Transmission Service...... 16
1.42aSPP...... 16
1.42bSPP Membership Agreement...... 16
1.42cSPP Region...... 16
1.43System Impact Study...... 16
1.44Third-Party Sale...... 17
1.44aTransition Period...... 17
1.45Transmission Customer...... 17
1.45aTransmission Owner...... 17
1.46Transmission Provider...... 17
1.47Transmission Provider's Monthly Transmission System Peak...... 17
1.48Transmission Service...... 18
1.49Transmission System...... 18
1.49aUsers...... 18
1.49bWholesale Distribution Service...... 18
1.50Zone...... 18
2Initial Allocation and Renewal Procedures...... 18
2.1Initial Allocation of Available Transmission Capability...... 18
2.2Reservation Priority For Existing Firm Service Customers...... 19
3 Ancillary Services...... 20
4Open Access Same-Time Information System (OASIS)...... 21
5Local Furnishing Bonds...... 22
5.1Transmission Owners That Own Facilities Financed by Local
Furnishing Bonds or that are Tax Exempt Entities...... 22
5.2Alternative Procedures for Requesting Transmission Service.....22
6Reciprocity...... 23
7Billing and Payment...... 24
7.1Billing Procedure...... 24
7.2Interest on Unpaid Balances...... 25
7.3Customer Default...... 25
8Accounting for Use of the Tariff...... 26
8.1Reserved...... 26
8.2Study Costs and Revenues...... 26
9Regulatory Filings...... 26
10Force Majeure and Indemnification...... 27
10.1Force Majeure...... 27
10.2Indemnification...... 27
11Creditworthiness...... 28
12Dispute Resolution Procedures...... 28
12.1Internal Dispute Resolution Procedures...... 28
12.2External Arbitration Procedures...... 29
12.3Arbitration Decisions...... 29
12.4Costs...... 30
12.5Rights Under The Federal Power Act...... 30
II.POINT-TO-POINT TRANSMISSION SERVICE...... 31
Preamble...... 31
13Nature of Firm Point-To-Point Transmission Service...... 31
13.1Term...... 31
13.2Reservation Priority...... 31
13.3Use of Firm Transmission Service by the Transmission Owners....32
13.4Service Agreements...... 32
13.5Transmission Customer Obligations for Facility Additions
or Redispatch Costs...... 33
13.6Curtailment of Firm Transmission Service...... 34
13.7Classification of Firm Transmission Service...... 35
13.8Scheduling of Firm Point-To-Point Transmission Service...... 37
14Nature of Non-Firm Point-To-Point Transmission Service ...... 38
14.1Term ...... 38
14.2Reservation Priority ...... 38
14.3Use of Non-Firm Point-To-Point Transmission Service by the
Transmission Owner(s)...... 40
Issued by: L. Patrick Bourne, Manager,
Transmission and Regulatory Policy
Issued on: October 27, 2000Effective: November 1, 2000
Southwest Power PoolOriginal Sheet No. 3
FERC Electric Tariff
Fourth Revised Volume No. 1
14.4Service Agreements ...... 40
14.5Classification of Non-Firm Point-To-Point Transmission Service.40
14.6Scheduling of Non-Firm Point-To-Point Transmission Service.....41
14.7Curtailment or Interruption of Service...... 42
15Service Availability...... 44
15.1General Conditions...... 44
15.2Determination of Available Transmission Capability...... 44
15.3Initiating Service in the Absence of an Executed
Service Agreement...... 45
15.4Obligation to Provide Transmission Service that Requires
Expansion or Modification of the Transmission System...... 45
15.5Deferral of Service...... 46
15.6Other Transmission Service Schedules...... 46
15.7Real Power Losses...... 46
16Transmission Customer Responsibilities...... 46
16.1Conditions Required of Transmission Customers...... 46
16.2Transmission Customer Responsibility for
Third-Party Arrangements...... 47
17Procedures for Arranging Firm Point-To-Point Transmission Service....47
17.1Application...... 47
17.1aTime Requirements...... 48
17.2Completed Application...... 48
17.3Deposit...... 49
17.4Notice of Deficient Application...... 50
17.5Response to a Completed Application...... 51
17.6Execution of Service Agreement...... 51
17.7Extensions for Commencement of Service...... 52
18Procedures for Arranging Non-Firm Point-To-Point Transmission Service52
18.1Application...... 52
18.2Completed Application...... 52
18.3Timing of Requests and Responses Regarding Reservation of
Non-Firm Point-To-Point Transmission Service...... 54
18.4Determination of Available Transmission Capability...... 54
19Additional Study Procedures For Firm Point-To-Point Transmission
Service Requests...... 54
19.1Notice of Need for System Impact Study...... 54
19.2System Impact Study Agreement and Cost Reimbursement...... 55
19.3System Impact Study Procedures...... 56
19.4Facilities Study Procedures...... 57
19.5Facilities Study Modifications...... 58
19.6Due Diligence in Completing New Facilities...... 58
19.7Partial Interim Service...... 59
19.8Expedited Procedures for New Facilities...... 59
20Procedures if The Transmission Provider is Unable to Complete New
Transmission Facilities for Firm Point-To-Point Transmission Service60
20.1Delays in Construction of New Facilities...... 60
20.2Alternatives to the Original Facility Additions...... 60
20.3Refund Obligation for Unfinished Facility Additions...... 61
21Provisions Relating to Transmission Construction and Services on
the Systems of Other Utilities...... 61
21.1Responsibility for Third-Party System Additions...... 61
21.2Coordination of Third-Party System Additions...... 62
22Changes in Service Specifications...... 63
22.1Modifications On a Non-Firm Basis...... 63
22.1aAdditional Charge To Prevent Abuse...... 64
22.2Modification On a Firm Basis...... 64
23Sale or Assignment of Transmission Service...... 65
23.1Procedures for Assignment or Transfer of Service...... 65
23.2Limitations on Assignment or Transfer of Service...... 66
23.3Information on Assignment or Transfer of Service...... 66
Issued by: L. Patrick Bourne, Manager,
Transmission and Regulatory Policy
Issued on: October 27, 2000Effective: November 1, 2000
Southwest Power PoolOriginal Sheet No. 4
FERC Electric Tariff
Fourth Revised Volume No. 1
24Metering and Power Factor Correction at Receipt and
Delivery Points(s)...... 67
24.1Transmission Customer Obligations...... 67
24.2Transmission Provider Access to Metering Data...... 67
24.3Power Factor...... 67
25Compensation for Transmission Service...... 67
26Stranded Cost Recovery...... 68
27Compensation for New Facilities and Redispatch Costs...... 68
III.NETWORK INTEGRATION TRANSMISSION SERVICE...... 69
Preamble...... 69
28Nature of Network Integration Transmission Service...... 69
28.1Scope of Service...... 69
28.2Transmission Provider and Transmission Owners Responsibilities.69
28.3Network Integration Transmission Service...... 70
28.4Secondary Service...... 70
28.5Real Power Losses...... 71
28.6Restrictions on Use of Service...... 71
29Initiating Service...... 71
29.1Condition Precedent for Receiving Service...... 71
29.2Application Procedures...... 72
29.3Technical Arrangements to be Completed Prior to Commencement
of Service...... 74
29.4Network Customer Facilities...... 75
29.5Filing of Service Agreement...... 75
30Network Resources...... 75
30.1Designation of Network Resources...... 75
30.2Designation of New Network Resources...... 75
30.3Termination of Network Resources...... 76
30.4Operation of Network Resources...... 76
30.5Network Customer Redispatch Obligation...... 76
30.6Transmission Arrangements for Network Resources Not Physically
Interconnected With The Transmission Provider...... 77
30.7Limitation on Designation of Network Resources...... 77
30.8Use of Interface Capacity by the Network Customer...... 77
30.9Network Customer Owned Transmission Facilities...... 77
31Designation of Network Load...... 78
31.1Network Load...... 78
31.2New Network Loads Connected With the Transmission Provider.....78
31.3Network Load Not Physically Interconnected with the
Transmission Provider...... 79
31.4New Interconnection Points...... 79
31.5Changes in Service Requests...... 79
31.6Annual Load and Resource Information Updates...... 80
32Additional Study Procedures For Network Integration Transmission
Service Requests...... 80
32.1Notice of Need for System Impact Study...... 80
32.2System Impact Study Agreement and Cost Reimbursement...... 81
32.3System Impact Study Procedures...... 82
32.4Facilities Study Procedures...... 82
33Load Shedding and Curtailments...... 84
33.1Procedures...... 84
33.2Transmission Constraints...... 84
33.3Cost Responsibility for Relieving Transmission Constraints.....85
33.4Curtailments of Scheduled Deliveries...... 85
33.5Allocation of Curtailments...... 85
33.6Load Shedding...... 86
33.7System Reliability...... 86
34Rates and Charges...... 87
34.1Monthly Demand Charge...... 87
34.2Determination of Network Customer's Monthly Network Load...... 88
34.3Determination of Transmission Provider's Monthly Zone
Transmission Load...... 88
Issued by: L. Patrick Bourne, Manager,
Transmission and Regulatory Policy
Issued on: October 27, 2000Effective: November 1, 2000
Southwest Power PoolOriginal Sheet No. 5
FERC Electric Tariff
Fourth Revised Volume No. 1
34.4Redispatch Charge...... 88
34.5Stranded Cost Recovery...... 89
34.6SPP Costs...... 89
35Operating Arrangements...... 89
35.1Operation under the Network Operating Agreement...... 89
35.2Network Operating Agreement...... 89
35.3Reserved...... 91
36Scheduling...... 91
IV.SPECIAL RULES ON USE OF TARIFF...... 92
37During Transition Period...... 92
37.1Service Not Required for Bundled Customers or Customers Under
Retail Access Programs...... 92
37.2Availability of Network Integration Transmission Service...... 92
37.3Unbundled Wholesale...... 92
37.4Grandfathered Transactions...... 92
38After Transition Period...... 93
38.1Applicability to Retail Load Having Choice...... 93
38.2Applicability to All Retail Load...... 93
38.3Grandfathered Agreements...... 93
SCHEDULE 1
Scheduling and Tariff Administration Service...... 94
SCHEDULE 2
Reactive Supply and Voltage Control from Generation Sources Service.....97
SCHEDULE 3
Regulation and Frequency Response Service...... 99
SCHEDULE 4
Energy Imbalance Service...... 100
SCHEDULE 5
Operating Reserve - Spinning Reserve Service...... 101
SCHEDULE 6
Operating Reserve - Supplemental Reserve Service...... 102
SCHEDULE 7
Long-Term Firm and Short-Term Firm Point-To-Point Transmission Service.103
SCHEDULE 8
Non-Firm Point-To-Point Transmission Service...... 106
SCHEDULE 9
Network Integration Transmission Service...... 109
SCHEDULE 10
Wholesale Distribution Service...... 112
ATTACHMENT A
Form Of Service Agreement For Firm Point-To-Point Transmission Service.113
ATTACHMENT B
Form Of Service Agreement For Non-Firm Point-To-Point
Transmission Service...... 118
ATTACHMENT C
Methodology To Assess Short-Term Available Transmission Capability.....120
ATTACHMENT D
Methodology for Completing a System Impact Study...... 127
ATTACHMENT E
Index Of Point-To-Point Transmission Service Customers...... 129
ATTACHMENT F
Service Agreement For Network Integration Transmission Service...... 132
ATTACHMENT G
Network Operating Agreement...... 145
ATTACHMENT H
Annual Transmission Revenue Requirement For Network Integration
Transmission Service...... 161
Issued by: L. Patrick Bourne, Manager,
Transmission and Regulatory Policy
Issued on: October 27, 2000Effective: November 1, 2000
Southwest Power PoolOriginal Sheet No. 6
FERC Electric Tariff
Fourth Revised Volume No. 1
ATTACHMENT I
Index Of Network Integration Transmission Service Customers...... 162
ATTACHMENT J
Recovery163 Of Costs Associated With New Facilities...... 163
ATTACHMENT K
Redispatch Procedures and Redispatch Costs...... 165
ATTACHMENT L
Treatment Of Revenues...... 172
ATTACHMENT M
Loss Compensation Procedure...... 176
ATTACHMENT N
Form Of Service Agreement For Loss Compensation Service...... 181
ATTACHMENT O
Coordinated Planning Procedures...... 183
ATTACHMENT P...... 188
ATTACHMENT Q
Form of Application For Short-Term Firm and Non-Firm
Transmission Service...... 191
ATTACHMENT R
North American Electric Reliability Council Transmission
Loading Relief (“TLR”) Procedure...... 192
ATTACHMENT S
Procedure for Calculation of MW-Mile Impacts for Use in Revenue
Allocation and Determination of Losses...... 211
ATTACHMENT T
Rate Sheets For Point-To-Point Transmission Service...... 217
ATTACHMENT U
Rate Schedule For Compensation For Rescheduled Maintenance Costs...... 249
ATTACHMENT V
Coordinated Generation Interconnection Procedures...... 258
Issued by: L. Patrick Bourne, Manager,
Transmission and Regulatory Policy
Issued on: October 27, 2000Effective: November 1, 2000
Southwest Power PoolOriginal Sheet No. 7
FERC Electric Tariff
Fourth Revised Volume No. 1
I.COMMON SERVICE PROVISIONS
1Definitions
1.1Ancillary Services: Those services that are necessary to support the transmission of capacity and energy from resources to loads while maintaining reliable operation of the Transmission Provider's and Transmission Owner's(s) Transmission System in accordance with Good Utility Practice.
1.2Annual Transmission Cost: The total annual cost of the Transmission System for purposes of Network Integration Transmission Service shall be the amount specified in Attachment H until amended by the Transmission Provider or modified by the Commission. [NOTE: This defined term is not used in the Tariff. Can it be eliminated? If it is retained, the definition needs to be revised.]
1.3Application: A request by an Eligible Customer for transmission service pursuant to the provisions of the Tariff.
1.3aAttachment Facilities: Facilities that serve to interconnect a generating unit with a Transmission Owner’s transmission facilities.
Base Funded Upgrades: Base Funded Upgrades shall comprise those upgrades included in and constructed pursuant to the SPP Base Transmission Expansion Plan in order to ensure that the reliability of the Transmission System. Base Funded Upgrades do not include transmission facilities in the 2005 base plan required to be in service to meet SPP and NERC reliability standards prior to [the target implementation date for the new transmission cost allocation].
1.4Commission: The Federal Energy Regulatory Commission.
1.5Completed Application: An Application that satisfies all of the information and other requirements of the Tariff, including any required deposit.
1.6Control Area: An electric power system or combination of electric power systems to which a common automatic generation control scheme is applied in order to:
(1)match, at all times, the power output of the generators within the electric power system(s) and capacity and energy purchased from entities outside the electric power system(s), with the load within the electric power system(s);
(2)maintain scheduled interchange with other Control Areas, within the limits of Good Utility Practice;
Issued by: L. Patrick Bourne, Manager,
Transmission and Regulatory Policy
Issued on: October 27, 2000Effective: November 1, 2000
Southwest Power PoolOriginal Sheet No. 8
FERC Electric Tariff
Fourth Revised Volume No. 1
(3)maintain the frequency of the electric power system(s) within reasonable limits in accordance with Good Utility Practice; and
(4)provide sufficient generating capacity to maintain operating reserves in accordance with Good Utility Practice.
1.7Curtailment: A reduction in firm or non-firm transmission service in response to a transmission capacity shortage as a result of system reliability conditions.
1.8Delivering Party: The entity supplying capacity and energy to be transmitted at Point(s) of Receipt.
1.9Designated Agent: Any entity that performs actions or functions required under the Tariff on behalf of the Transmission Provider, a Transmission Owner, an Eligible Customer, or the Transmission Customer.
1.10Direct Assignment Facilities: Facilities or portions of facilities that are constructed by any Transmission Owner(s) for the sole use/benefit of a particular Transmission Customer or a particular group of customers or a particular Generation Interconnection Customer requesting service under the Tariff. Direct Assignment Facilities shall be specified in the Service Agreements that govern service to the Transmission Customer(s) and Generation Interconnection Customer(s) and shall be subject to Commission approval.
1.10aEffective Date: For Short-Term Firm and Non-Firm Point-To-Point Transmission Service the Effective Date of this Tariff is June 1, 1998. For Long-Term Firm Point-To-Point Transmission Service the Effective Date of this Tariff is April 1, 1999. For Network Integration Transmission Service the Effective Date of this Tariff is February 1, 2000.
Issued by: L. Patrick Bourne, Manager,
Transmission and Regulatory Policy
Issued on: October 27, 2000Effective: November 1, 2000
Southwest Power PoolSubstitute First Revised Sheet No. 9
FERC Electric TariffSuperseding Original Sheet No. 9
Fourth Revised Volume No. 1
1.11Eligible Customer: (i) Any electric utility (including the Transmission Owner(s) and any power marketer), Federal power marketing agency, or any person generating electric energy for sale for resale. Electric energy sold or produced by such entity may be electric energy produced in the United States, Canada or Mexico. However, with respect to transmission service that the Commission is prohibited from ordering by Section 212(h) of the Federal Power Act, such entity is eligible only if the service is provided pursuant to a state requirement that a Transmission Owner offer the unbundled transmission service, or pursuant to a voluntary offer of such service by a Transmission Owner. (ii) Any retail customer taking unbundled transmission service pursuant to a state requirement that a Transmission Owner offer the transmission service, or pursuant to a voluntary offer of such service by a Transmission Owner, is an Eligible Customer under the Tariff.
1.12Facilities Study: An engineering study conducted by the Transmission Provider in collaboration with the affected Transmission Owner(s) to determine the required modifications to the Transmission System, including the cost and scheduled completion date for such modifications, that will be required to provide the requested transmission service or generation interconnection. The Transmission Provider shall have the ultimate responsibility for any such studies. However, the Transmission Provider’s final decision must be consistent with Good Utility Practice. Facilities studies for any facilities not under the operational control of the Transmission Provider shall be performed by the Transmission Owner or any entity it designates to perform the studies.
Issued by: L. Patrick Bourne, Manager,
Transmission and Regulatory Policy
Issued on: August 8, 2001Effective: June 1, 2001
Filed to comply with Order of the Federal Energy Regulatory Commission,
Docket No. ER01-1989-000, issued July 9, 2001, 96 FERC ¶ 61,034 (2001).
Southwest Power PoolOriginal Sheet No. 10
FERC Electric Tariff
Fourth Revised Volume No. 1
1.12aFeasibility Study: A coordinated preliminary determination by the Transmission Provider and the affected Transmission Owner(s) of the Attachment Facilities, other Direct Assignment Facilities, and system upgrades that are needed to accept power into the grid at the interconnection receipt point, that will be necessary to accommodate a Generation Interconnection Request made under Attachment V.
1.12bFederal Power: All power and energy generated at reservoir projects under the control of the Department of Army in the marketing area of the Southwestern Power Administration (Southwestern) plus power and energy delivered to Southwestern from other sources for the purpose of fulfilling Southwestern’s contractual obligations for the sale of power and energy pursuant to Southwestern’s Federal power allocations.
1.13Firm Point-To-Point Transmission Service: Transmission Service under this Tariff that is reserved and/or scheduled between specified Points of Receipt and Delivery pursuant to Part II of this Tariff.
1.13aGeneration Interconnection Customer: An entity that submits a Generation Interconnection Request under Attachment V.
1.13bGeneration Interconnection Request: A request made under Attachment V to connect a generating unit to the Transmission System or to increase the capacity of a generating unit that is connected to the Transmission System.
1.14Good Utility Practice: Any of the practices, methods and acts engaged in or approved by a significant portion of the electric utility industry during the relevant time period, or any of the practices, methods and acts which, in the exercise of reasonable judgment in light of the facts known at the time the decision was made, could have been expected to accomplish the desired result at a reasonable cost consistent with good business practices,
Issued by: L. Patrick Bourne, Manager,
Transmission and Regulatory Policy
Issued on: October 27, 2000Effective: November 1, 2000
Southwest Power PoolOriginal Sheet No. 11
FERC Electric Tariff
Fourth Revised Volume No. 1
reliability, safety and expedition. Good Utility Practice is not intended to be limited to the optimum practice, method, or act to the exclusion of all others, but rather to be acceptable practices, methods, or acts generally accepted in the region.
1.14aGrandfathered Agreements or Transactions: Grandfathered Agreements or Transactions include (1) firm transmission under transmission agreements executed before the effective date of the Tariff (Effective Date); (2) transmission under bundled wholesale contracts (which reserve transmission as part of the contract); (3) accepted and confirmed short-term firm and non-firm point-to-point transmission transactions which were accepted and confirmed prior to the Effective Date; (4) existing or new contracts entered into by the Southwestern Power Administration on behalf of the United States for the use of transmission facilities of the Southwestern Power Administration that are constructed or acquired by purchase or other agreement, as authorized under Section 5 of the Flood Control Act of 1944, for the transmission of Federal Power; and (5) contracts executed before the Effective Date, regardless of term, entered into by the Southwestern Power Administration on behalf of the United States for the transmission of power or energy across transmission facilities owned and operated by the Southwestern Power Administration. Umbrella service agreements are specifically not grandfathered.
1.15Interruption: A reduction in non-firm transmission service due to economic reasons pursuant to Section 14.7.
Issued by: L. Patrick Bourne, Manager,
Transmission and Regulatory Policy
Issued on: October 27, 2000Effective: November 1, 2000
Southwest Power PoolOriginal Sheet No. 12
FERC Electric Tariff
Fourth Revised Volume No. 1
1.16Load Ratio Share: Ratio of a Transmission Customer's Network Load in a Zone to the total load in that Zone computed in accordance with Sections 34.2 and 34.3 of the Network Integration Transmission Service under part III of this Tariff and calculated on a calendar year basis. [Note: May need to add a new definition(s) to describe load ratio share as applied to the zonal component or regional component for Base Funded Upgrades depending how the Zonal Rate/Charge and Universal Rate/Charge are calculated. Existing Facilities Load Ratio Share v. Zonal Load Ratio Share v. Universal Load Ratio Share.]
1.17Load Shedding: The systematic reduction of system demand by temporarily decreasing load in response to transmission system or area capacity shortages, system instability, or voltage control considerations under Part III of the Tariff.
1.18Long-Term Firm Point-To-Point Transmission Service: Firm Point-To-Point Transmission Service under Part II of the Tariff with a term of one year or more.