{"abstract":"This notice of filing announces that a petition has been filed requesting that polyisobutylene 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.","action":"Notice of filing and request for comments.","agencies":[{"raw_name":"DEPARTMENT OF THE TREASURY","name":"Treasury Department","id":497,"url":"https://www.federalregister.gov/agencies/treasury-department","json_url":"https://www.federalregister.gov/api/v1/agencies/497","parent_id":null,"slug":"treasury-department"},{"raw_name":"Internal Revenue Service","name":"Internal Revenue Service","id":254,"url":"https://www.federalregister.gov/agencies/internal-revenue-service","json_url":"https://www.federalregister.gov/api/v1/agencies/254","parent_id":497,"slug":"internal-revenue-service"}],"body_html_url":"https://www.federalregister.gov/documents/full_text/html/2025/04/02/2025-05634.html","cfr_references":[],"citation":"90 FR 14521","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"Written comments and requests for a public hearing must be received on or before June 2, 2025.","disposition_notes":null,"docket_ids":[],"dockets":[],"document_number":"2025-05634","effective_on":null,"end_page":14522,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2025/04/02/2025-05634.xml","html_url":"https://www.federalregister.gov/documents/2025/04/02/2025-05634/superfund-tax-on-chemical-substances-request-to-modify-list-of-taxable-substances-notice-of-filing","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2025-05634?publication_date=2025-04-02","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2025-04-02/2025-05634/mods.xml","not_received_for_publication":null,"page_length":2,"page_views":{"count":340,"last_updated":"2026-07-27 10:15:03 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2025-04-02/pdf/2025-05634.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2025-05634.pdf?1743511514","publication_date":"2025-04-02","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2025/04/02/2025-05634.txt","regulation_id_number_info":{},"regulation_id_numbers":[],"regulations_dot_gov_info":{"checked_regulationsdotgov_at":"2025-04-02T08:04:30Z"},"regulations_dot_gov_url":null,"significant":null,"signing_date":null,"start_page":14521,"subtype":null,"title":"Superfund Tax on Chemical Substances; Request To Modify List of Taxable Substances; Notice of Filing for Polyisobutylene","toc_doc":"Modification to List of Taxable Substances; Polyisobutylene","toc_subject":"Superfund Tax on Chemical Substances; Request to Modify List of Taxable Substances;","topics":[],"type":"Notice","volume":90}