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REGULATION | 6 Months Ended
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Mar. 31, 2019
Regulated Operations [Abstract] |
REGULATION | 4. REGULATION NJNG is subject to cost-based regulation, therefore, it is permitted to recover authorized operating expenses and earn a reasonable return on its utility capital investments based on the BPU's approval. The impact of the ratemaking process and decisions authorized by the BPU allows NJNG to capitalize or defer certain costs that are expected to be recovered from its customers as regulatory assets and to recognize certain obligations representing amounts that are probable future expenditures as regulatory liabilities in accordance with accounting guidance applicable to regulated operations. NJNG's recovery of costs is facilitated through its base rates, BGSS and other regulatory tariff riders. NJNG is required to make annual filings to the BPU for review of its BGSS, CIP and various other programs and related rates. Annual rate changes are typically requested to be effective at the beginning of the following fiscal year. All rate and program changes are subject to proper notification and BPU review and approval. In addition, NJNG is also permitted to implement certain BGSS rate changes on a provisional basis with proper notification to the BPU. Regulatory assets and liabilities included on the Unaudited Condensed Consolidated Balance Sheets are comprised of the following:
(Thousands) | March 31, 2019 | September 30, 2018
Regulatory assets-current |  |
New Jersey Clean Energy Program | $ | 5,772 |  | $ | 14,052 |
Underrecovered gas costs | 12,093 |  | 4,137 |
Conservation Incentive Program | 40 |  | — |
Derivatives at fair value, net | 1 |  | 108 |
Total current regulatory assets | $ | 17,906 |  | $ | 18,297 |
Regulatory assets-noncurrent |  |
Environmental remediation costs |  |
Expended, net of recoveries | $ | 31,436 |  | $ | 33,017 |
Liability for future expenditures | 128,897 |  | 130,800 |
Deferred income taxes | 18,499 |  | 17,225 |
Derivatives at fair value, net | 9 |  | — |
SAVEGREEN | 5,570 |  | 8,636 |
Postemployment and other benefit costs | 135,316 |  | 136,716 |
Deferred storm damage costs | 9,772 |  | 10,858 |
Cost of removal | 37,847 |  | 22,339 |
Other noncurrent regulatory assets | 9,074 |  | 9,001 |
Total noncurrent regulatory assets | $ | 376,420 |  | $ | 368,592 |
Regulatory liabilities-current |  |
Conservation Incentive Program | $ | — |  | $ | 6,994 |
Derivatives at fair value, net | 3,717 |  | 1,191 |
Total current regulatory liabilities | $ | 3,717 |  | $ | 8,185 |
Regulatory liabilities-noncurrent |  |
Tax Act impact (1) | $ | 202,912 |  | $ | 205,410 |
New Jersey Clean Energy Program | 4,198 |  | 1,902 |
Other noncurrent regulatory liabilities | 1,759 |  | 1,827 |
Total noncurrent regulatory liabilities | $ | 208,869 |  | $ | 209,139 |
(1) | Reflects the re-measurement and subsequent amortization of NJNG's net deferred tax liabilities as a result of the change in federal tax rates enacted in the Tax Act.
Regulatory filings and/or actions that occurred during the current fiscal year include the following:
• | On December 18, 2018, the BPU approved a decrease in NJNG's EE recovery rate reflecting actual costs incurred through September 30, 2018, which will result in an annual decrease of $8.8 million, effective January 1, 2019.
• | On December 28, 2018, NJNG notified the BPU that it will increase the BGSS rate, effective February 1, 2019, resulting in an estimated $10.9 million increase to the revenues credited to BGSS from February through September 30, 2019.
• | On February 28, 2019, NJNG filed a petition with the BPU seeking authority to implement a five-year IIP. The IIP consists of two components, transmission and distribution investments and information technology replacement and enhancements. The total investment for the IIP is approximately $507 million. All approved investments will be recovered through annual filings to adjust base rates.
• | On March 29, 2019, the BPU approved NJNG’s annual SBC application requesting recovery of remediation expenses incurred through June 30, 2018, an increase in the RAC rate of $1.4 million and an increase in the NJCEP factor of $1.9 million, effective April 1, 2019.
• | On March 29, 2019, NJNG filed a petition with the BPU requesting a base rate increase of approximately $8.7 million for the recovery associated with NJ RISE and SAFE II capital investment costs of approximately $75 million made through June 30, 2019. Changes to base rates are anticipated to be effective October 1, 2019.
• | On March 29, 2019, NJNG filed a base rate case with the BPU requesting a natural gas revenue increase of $128.2 million, including a change in the Company’s overall rate of return on rate base to 7.87 percent. NJNG is also seeking permission to request recovery for SRL in a future filing, upon completion of the project.

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