Full Text
REGD. No. D. L.-33004/99
The Gazette of India
CG-DL-E-04072025-264360
EXTRAORDINARY
PART III—Section 4
PUBLISHED BY AUTHORITY
NEW DELHI, WEDNESDAY, JULY 2, 2025/ASHADHA 11, 1947
No. 472]
4356 GI/2025
(1)
CENTRAL ELECTRICITY REGULATORY COMMISSION
NOTIFICATION
New Delhi, the 26th June, 2025
F.No. L-1/250/2019/CERC— In exercise of the powers conferred under Section 178 read
with Part V of the Electricity Act, 2003 (36 of 2003), and all other powers enabling it in this behalf,
and after previous publication, the Central Electricity Regulatory Commission hereby makes the
following regulations to amend the Central Electricity Regulatory Commission (Sharing of Inter-State
Transmission Charges and Losses) Regulations, 2020 (hereinafter referred to as "the Principal
Regulations") namely:
1. SHORT TITLE AND COMMENCEMENT:
(1) These regulations may be called the Central Electricity Regulatory Commission (Sharing of Inter-
State Transmission Charges and Losses) (Fourth Amendment) Regulations, 2025.
(2) These regulations shall come into effect from the date of publication in the official Gazette.
2. Amendment To Regulation 2 Of The Principal Regulations:
(1) New Sub-Clauses (Aa-I) And (Aa-Ii) Shall Be Included After Subclause (Aa) Of Regulation 2 Of The
Principal Regulations As Under:
“(Aa-I) ‘Tariff Regulations' Means The Central Electricity Regulatory Commission (Terms And
Conditions Of Tariff) Regulations, 2024, As Amended From Time To Time;
(Aa-ii) 'Terminal Bay' Shall Have The Same Meaning As Defined In The Gna Regulations;"
3. Amendment To Regulation 9 Of The Principal Regulations:
(1) First Proviso To Regulation 9(8) Of The Principal Regulations Shall Be Substituted As Under:
"Provided That Drawee Dics (Other Than The Distribution Licensees Of The State) Located Within
The State Control Area, And Having Obtained Separate Gna, Which Are Not Included In The Gna
Of The Distribution Licensees Of The State, Shall Be Apportioned The Transmission Charges Out
Of The Aggregate Ac-Ubc Charges For The State In Proportion To Their Gna."
4. Amendment To Regulation 12 Of The Principal Regulations:
(1) Two New Provisos Shall Be Added After The Third Proviso Of Sub-Clause (A) Of Clause (1) Of
Regulation 12 Of The Principal Regulations As Under:
"Provided Also That For A Generating Station Having Dual Connectivity To Both Inter-State
Transmission System And Intra-State Transmission System, The Transmission Deviation Shall Be
Computed As Net Metered Ex-Bus Injection, In A Time Block In Excess Of The Sum Of 'Gna To
The Inter-State Transmission System And Access With Stu System';
Provided Also That The Details Of Access With Stu Shall Be Shared By Stu With Nlde And Ctu."
5. Amendment To Regulation 13 Of The Principal Regulations:
(1)The Words "Or (Iv) Regs Based On Offshore Wind" Shall Be Inserted After The Words "(Iii)
Generation Based On Hydro Power Sources" In Clause (2) Of Regulation 13 Of The Principal
Regulations.
(2) The Sub-Clauses (A) And (B) Of Clause (2) Of Regulation 13 Of The Principal Regulations Shall Be
Substituted As Under:
"(a) REGS or RHGS based on wind or solar source or a combination of wind and solar source shall
be eligible for the grant of waiver as per Table 1 below:
TABLE 1: REGS or RHGS
+---------------------------+-----------------------+-------------------------------------------------------------+
| Category | Period of COD | Number of % of drawal Schedule from |
| | | years from identified generating |
| | | COD station, to be |
| | | considered under |
| | | Annexure-III |
+---------------------------+-----------------------+-----------+-------------------------------------------------+
| REGS based on wind | On or before 30.6.2025| 25 years | 100 |
| or solar source or | 1.7.2025 to 30.6.2026 | 25 years | 75 |
| RHGS based wind | 1.7.2026 to 30.6.2027 | 25 years | 50 |
| and solar source | 1.7.2027 to 30.6.2028 | 25 years | 25 |
| | After 30.6.2028 | | 0 |
+---------------------------+-----------------------+-----------+-------------------------------------------------+
(b) ESS shall be eligible for the grant of waiver as below and shall be subject to conditions as per
sub-clause (c) of this Clause:
(i) Hydro PSP ESS, for which construction work has been awarded on or before 30.6.2028, shall be
eligible for a waiver of transmission charges for a period of 25 years from the COD.
Explanation: When such Hydro PSP is supplying power to a drawee DIC,100% of the drawal
schedule for the drawee DIC from such Hydro PSP shall be considered under Annexure-III for the
calculation of waiver.
(II) Battery Ess Shall Be Eligible For Grant Of Waiver As Per Table 2 Below:
TABLE 2: BATTERY ESS
+-------+----------------------------------------------------------------------------------------------------------------------------------------------------------------+-----------------------+-----------------------+-------------------------------------------------------------------------------------+
| S. No.| Category | Period of COD | Number of | % of drawal Schedule for |
| | | | years from | drawee DIC when |
| | | | COD | seller is ESS, to be |
| | | | | considered under |
| | | | | Annexure-III |
+-------+----------------------------------------------------------------------------------------------------------------------------------------------------------------+-----------------------+-----------------------+-------------------------------------------------------------------------------------+
| 1. | Battery ESS connected at a substation where REGS is connected and is charged from such REGS | On or before 30.6.2028| 12 years | 100 |
+-------+----------------------------------------------------------------------------------------------------------------------------------------------------------------+-----------------------+-----------------------+-------------------------------------------------------------------------------------+
| 2. | Battery ESS connected at a substation where no REGS is connected or Battery ESS connected at a substation where REGS is connected but Battery ESS is charged | On or before 30.6.2025| 12 years | 100 |
| | from Grid or source other than REGS or any other battery ESS not covered under S.No.1 of this Table. | 1.7.2025 to 30.6.2026 | 12 years | 75 |
| | | 1.7.2026 to 30.6.2027 | 12 years | 50 |
| | | 1.7.2027 to 30.6.2028 | 12 years | 25 |
| | | After 30.6.2028 | NA | 0 |
+-------+----------------------------------------------------------------------------------------------------------------------------------------------------------------+-----------------------+-----------------------+-------------------------------------------------------------------------------------+
Provided That Battery Ess, Which Is Covered Under S. No. 1 Of Table 2, Is Required To Be
Charged From Such Regs Which Is Connected At The Same Substation, May Charge Its Battery
Ess From The Grid Under Contingency, Subject To Gna Regulations And Grid Code And Subject
To The Condition That Energy Drawal From Grid Under Such Contingency (Ies) In A Year, Shall
Not Exceed 10% Of Total Energy Requirement In A Year For Charging The Battery Ess:
Provided Also That For The Purpose Of These Regulations, Regs Collocated With Battery Ess
And Installed Only For The Purpose Of Charging Such Ess With No Additional Connectivity
Quantum At The Ists Substation Shall Also Qualify Such Battery Ess Under S.No.1 Of Table 2."
(3) The Sub-Clauses (E) And (F) Of Clause (2) Of Regulation 13 Of The Principal Regulations Shall Be
Substituted As Under:
"(e) Hydro generating station shall be eligible for the grant of waiver as per Table 3 below:
Table 3: Hydro Generating Stations
+---------------------------------------------------------+-----------------------------------+-----------------------------------------------------------------------+
| Date of signing of PPA and award of | Number of years from | % of drawal Schedule from the |
| construction work | COD | hydro generating station, to be |
| | | considered under Annexure-III |
+---------------------------------------------------------+-----------------------------------+-----------------------------------------------------------------------+
| On or after 1.12.2022 and On or before 30.6.2025 | 18 years | 100% |
| 1.7.2025 to 30.6.2026 | 18 years | 75 |
| 1.7.2026 to 30.6.2027 | 18 years | 50 |
| 1.7.2027 to 30.6.2028 | 18 years | 25 |
| After 30.6.2028 | NA | 0 |
+---------------------------------------------------------+-----------------------------------+-----------------------------------------------------------------------+
The date for eligibility for waiver shall be considered as of the date of signing of the PPA or award of
construction work, whichever is later.
(f) Waiver for REGS based on Offshore Wind or Green hydrogen or Green Ammonia Plants shall be
calculated in terms of Table 4 and Table 5 below:
Table 4: REGS based on Offshore Wind:
+-----------------------+-----------------------+-----------------------------------------------------------------------------+
| Period of COD | Number of years | % of drawal Schedule from offshore |
| | from COD | wind generating station, to be |
| | | considered under Annexure-III |
+-----------------------+-----------------------+-----------------------------------------------------------------------------+
| On or before 31.12.2032| 25 years | 100 |
| 01.01.2033 to 31.12.2033| 25 years | 75 |
| 01.01.2034 to 31.12.2034| 25 years | 50 |
| 01.01.2035 to 31.12.2035| 25 years | 25 |
| After 31.12.2035 | NA | 0 |
+-----------------------+-----------------------+-----------------------------------------------------------------------------+
Table 5: Waiver of transmission charges for the use of ISTS for Green Hydrogen or Green
Ammonia Plant as a drawee DIC:
+-----------------------+-----------------------+-----------------------------------------------------------------------------+
| Period of COD | Number of years from | % of drawal Schedule for such plants as a |
| | COD | drawee DIC, to be considered under |
| | (2) | Annexure-III |
| | | (3) |
+-----------------------+-----------------------+-----------------------------------------------------------------------------+
| Upto 31.12.2030 | 25 years | 100 |
| 01.01.2031to 31.12.2031| 25 years | 75 |
| 01.01.2032 to 31.12.2032| 25 years | 50 |
| 01.01.2033 to 31.12.2033| 25 years | 25 |
| After 01.01.2034 | 0 | |
+-----------------------+-----------------------+-----------------------------------------------------------------------------+
As a drawee DIC, a Green Hydrogen or Green Ammonia Plant having drawal schedule from (i)
REGS or RHGS based on wind (including off shore wind) or solar source, (ii) ESS which is
meeting at least 51% of its annual electricity requirement for pumping of water or charging of
battery with electricity generated from REGS or RHGS based on wind or solar source and (iii)
Hydro generating station, shall be eligible to waiver considering drawal schedule as per Table 5 or
as per Tables 1 to 4 and sub-clause (b)(i) and (d) of Clause (2) of this Regulation, whichever is
higher.
Illustration:
(i) A Green Hydrogen plant 'G1', which declares COD on 01.01.2032 (eligible for 50% waiver as
per Table 5), is scheduling power from a REGS based on wind source ‘W1' which has declared
commercial operation on 01.07.2025 (eligible for 75% waiver under Table 1). In this case, the
drawal schedule from such REGS to such Green Hydrogen plant will be considered @ 75% under
Annexure-III. While calculating waiver for consumption of RE generation by G1 in year 2052, the
period of waiver for W1 has already expired as on 2050, suppose G1 takes RE power from another
generation project which has declared COD in year 2030 or it takes from W1 (supposing life of W1
got extended), the applicable waiver for G1 shall be 50%.
(ii) A Green Hydrogen plant, which declares COD on 01.01.2030, is scheduling power from a
REGS based on a wind source, which has declared commercial operation on 01.07.2027. In this
case, the drawal schedule from such REGS to such Green Hydrogen plant will be considered @
100% under Annexure-III."
(4)New Sub-Clauses (H) And (I) Shall Be Inserted After Sub-Clause (G) Under Clause (2) Of Regulation
13 Of The Principal Regulations As Under:
A "(H) Any Regs Based On Wind Or Solar Source Or Rhgs Based On Combination Of Wind And
Solar Source Or Battery Ess Which Is Eligible For A Waiver Of Inter-State Transmission
Charges Under Regulation 13(2) Of These Regulations And Is Having Its Scheduled Date Of
Commercial Operation (Scod) On Or Before 30th June 2025 Is Granted Extension Of Time To
Achieve Commercial Operation Date (Cod) On Account Of Any Force Majeure Event Including
Non-Availability Of Transmission System Or For Reasons Not Attributable To The Regs, And
The Project Achieves Cod On Or Before The Extended Date, It Shall Be Eligible For A Waiver
Of Inter-State Transmission Charges As If The Said Regs Had Achieved Cod On 30.6.2025.
Such Extension To Achieve Scod For The Purpose Of This Regulation Shall Not Exceed A
Period Of Six Months At A Time And Not More Than Two Times, Where The Extension
Provided Is For A Period Beyond 30.06.2025. Such Extension Shall Be Granted By:
(I) Renewable Energy Implementing Agency Or A Distribution Licensee Or An Authorized
Agency On Behalf Of A Distribution Licensee Or Mnre As Per The Competent Authority In
Terms Of The Power Purchase Agreements, Where Ppa Has Been Entered Into Consequent
To Tariff Based Competitive Bidding, Under Section 63 Of The Act;
(II) Commission Based On Recommendations Of Committee To Be Appointed By The
Commission, For Cases Other Than Covered In Sub-Clause (I) Of This Clause. For The
Purpose Of Seeking Such Extension, The Concerned Generation Project Or Ess Shall File
An Application To The Committee As Notified Through A Separate Order By The
Commission.
B(I) For The Purpose Of Monthly Transmission Charges By Nldc, The Requirement Of Subclause
(C) And (F) Of This Regulation For Ess Regarding Meeting 51% Of Its Annual Electricity
Requirement For Pumping Of Water Or Charging Of Battery With Electricity Generated From
Regs Or Rhgs Based On Wind Or Solar Source Shall Be Taken Based On Self-Declaration By
The Entity Claiming Such Waiver. After Completion Of The Financial Year, It Shall Be Verified
By Nldc Whether The 51% Criteria Have Been Met, Failing Which Revised Bills For
Transmission Charges Shall Be Raised, Considering No Waiver For Such Entity."
(5) The Second Proviso Of Clause (3) Of Regulation 13 Of The Principal Regulations Shall Be
Substituted As Follows:
"Provided further that where the Terminal Bay(s) at the ISTS sub-station in the scope of the
transmission licensee have achieved COD and the COD of a Connectivity grantee (COD of
generation capacity within the Renewable Power Park in case Connectivity Grantee is Renewable
Power Park Developer) has not been achieved, on or before start date of Connectivity of the
Connectivity Grantee, the Connectivity Grantee shall pay Yearly Transmission Charges for the
Terminal Bay(s) corresponding to the Connectivity capacity which has not achieved COD:
Provided also that Yearly Transmission Charges in respect of the Associated Transmission
System and terminal bay(s) corresponding to the Connectivity capacity that have achieved COD
shall be included for determination of transmission charges of DICs in accordance with
Regulations 5 to 8 of these regulations."
(6) The Words 'Associated Transmission System' Occurring Multiple Times Shall Be Replaced With The
Words 'Associated Transmission System And Terminal Bay(S)' In Clause (6) Of Regulation 13 Of
The Principal Regulations.
(7)New Clauses (14) And (15) Shall Be Added After Clause (13) Of Regulation 13 Of The Principal
Regulations As Under:
"(14) Availability of the Transmission System
Notwithstanding any provisions to the contrary in the Transmission Service Agreement under tariff
based competitive bidding, the Transmission System Availability Factor of a transmission system or
an element hereof shall be calculated as specified in the relevant Tariff Regulations.
(15) For the purpose of billing under Clauses (1) to (12) of Regulation 13 of these regulations, where
the Yearly Transmission Charges of corresponding elements are not available, the Yearly
Transmission Charges for such elements shall be worked out and provided by the Central
Transmission Utility, apportioning Yearly Transmission Charges approved by the Commission for the
integrated project, based on indicative capital cost."
HARPREET SINGH PRUTHI, Secy.
[Advt.-III/4/Exty./205/2025-26]
Note:
(1) The Central Electricity Regulatory Commission (Sharing of Inter-State Transmission Charges and
Losses) Regulations, 2020 were published on 01.07.2020 in Part III, Section 4 of the Gazette of India
(Extraordinary) No 243.
(2) The Central Electricity Regulatory Commission (Sharing of Inter-State Transmission Charges and
Losses) (First Amendment) Regulations, 2023 were published on 01.03.2023 in Part III, Section 4 of the
Gazette of India (Extraordinary) No 149.
(3) The Central Electricity Regulatory Commission (Sharing of Inter-State Transmission Charges and
Losses) (Second Amendment) Regulations, 2023 were published on 27.10.2023 in Part III, Section 4 of
the Gazette of India (Extraordinary) No 733.
(4) The Central Electricity Regulatory Commission (Sharing of Inter-State Transmission Charges and
Losses) (Third Amendment) Regulations, 2023 were published on 27.10.2023 in Part III, Section 4 of
the Gazette of India (Extraordinary) No 734.
Uploaded by Dte. of Printing at Government of India Press, Ring Road, Mayapuri, New Delhi-110064
and Published by the Controller of Publications, Delhi-110054.
GORAKHA NATH
YADAVA
Digitally signed by GORAKHA NATH
YADAVA
Date: 2025.07.04 11:41:39 +05'30'