For a searchable, indexed database that contains and links to all guidance documents in effect from the Federal Motor Carrier Safety Administration, please visit FMCSA’s Guidance Portal. To view the latest eCFR version of FMCSA’s Regulations in 49 CFR Parts 300-399, click the link in the “eCFR Regulation Text” column. To search and browse regulations using the eCFR website, use the link below.