fr_document_number,regs_document_id
E8-16443,PHMSA-2008-0031-0002
E8-16443,PHMSA-RSPA-1997-2131-0024
E8-16443,PHMSA-RSPA-1998-4243-0002
E8-16443,PHMSA-RSPA-2001-10753-0036
E8-16443,PHMSA-RSPA-2002-13796-0029