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TREAS/IRS RIN: 1545-BQ40 Publication ID: Spring 2023 
Title: Superfund Chemical Tax and Superfund Imported Substance Tax 

Section 80201 of the Infrastructure Investment and Jobs Act (IIJA), Public Law 117-58, 135 Stat. 429 (November 15, 2021) reinstates, effective July 1, 2022, the excise taxes imposed on certain chemical substances by sections 4661 and 4671 of the Internal Revenue Code, and modifies the applicable rates of tax and other provisions related to those taxes.  This NPRM will provide rules related to the taxes imposed by sections 4661 and 4671 of the Internal Revenue Code. 

Agency: Department of the Treasury(TREAS)  Priority: Other Significant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Proposed Rule Stage 
Major: No  Unfunded Mandates: No 
CFR Citation: 26 CFR 52   
Legal Authority: 26 U.S.C. 7805    26 U.S.C. 4661    26 U.S.C. 4671   
Legal Deadline:  None
Action Date FR Cite
NPRM  06/00/2023 
Additional Information: REG-105954-22 (NPRM) Drafter attorney: Stephanie Bland (202) 317-5263 Reviewer attorney: Amanda Dunlap (202) 317-5261 Treasury attorney: Kimberly Wojcik (202) 819-5365 CC:PSI:B7
Regulatory Flexibility Analysis Required: Undetermined  Government Levels Affected: Undetermined 
Federalism: No 
Included in the Regulatory Plan: No 
RIN Data Printed in the FR: No 
Agency Contact:
Stephanie N. Bland
Department of the Treasury
Internal Revenue Service
1111 Constitution Avenue NW, Room 5314,
Washington, DC 20224
Phone:202 317-6855
Fax:855 591-7869