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Notice

Superfund Tax on Chemical Substances; Request To Modify List of Taxable Substances; Notice of Filing for Chloro-Isobutene-Isoprene Rubber (n=97.75, m=2.25)

Notice of filing and request for comments.

📖 Research Context From Federal Register API

Summary:

This notice of filing announces that a petition has been filed requesting that chloro-isobutene-isoprene rubber ((C<INF>4</INF>H<INF>8</INF>)<INF>n</INF>- (C<INF>5</INF>H<INF>7.31</INF>Cl<INF>0.69</INF>)<INF>m</INF>; n=97.75, m=2.25) be added to the list of taxable substances. This notice of filing also requests comments on the petition. This notice of filing is not a determination that the list of taxable substances is modified.

Key Dates
Citation: 90 FR 39468
Written comments and requests for a public hearing must be received on or before October 14, 2025.
Public Participation

In Plain English

What is this Federal Register notice?

This is a notice published in the Federal Register by Treasury Department, Internal Revenue Service. Notices communicate information, guidance, or policy interpretations but may not create new binding obligations.

Is this rule final?

This document is classified as a notice. It may or may not create enforceable regulatory obligations depending on its specific content.

Who does this apply to?

Notice of filing and request for comments.

When does it take effect?

Written comments and requests for a public hearing must be received on or before October 14, 2025.

Document Details

Document Number2025-15564
FR Citation90 FR 39468
TypeNotice
PublishedAug 15, 2025
Effective Date-
RIN-
Docket ID-
Pages39468–39469 (2 pages)
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