Car Safety: Complete Guide Part 389

FMCSA Regulations and Interpretations – 49 CFR Parts 300-399 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. FMCSA Regulations and Interpretations – 49 CFR Parts 300-399 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. The terms specified in this part may be supplemented from time to time by specific agreement between the Federal Motor Carrier Safety Administration and the appropriate State authority in order to further implement the provi-sions of 49 U.S.C. The terms specified in this part may be supplemented from time to time by specific agreement between the Federal Motor Carrier Safety Administration and the appropriate State authority in order to further implement the provi-sions of 49 U.S.C.