id,agency_id,docket_id,title,document_type,subtype,posted_date,posted_year,posted_month,comment_start_date,comment_end_date,last_modified,fr_doc_num,open_for_comment,withdrawn,object_id IRS-2021-0018-0001,IRS,IRS-2021-0018,Superfund; Initial List of Taxable Substances; Registration; Procedural Rules; Request for Comments; Suspension of Notice 89-61 (Notice 2021-66),Notice,Notice of Publication,2021-12-13T05:00:00Z,2021,12,2021-12-13T05:00:00Z,2022-01-29T04:59:59Z,2025-02-22T02:00:50Z,,1,0,0900006484ec1baa