rules and regulations § 382.307: Reasonable suspicion testing. § 382.305: Random testing. directly after a crash alcohol and drug use testing drug and alcohol regulations Regulations http://www.fmcsa.dot.gov/regulations/title49/section/382.303 49 C.F.R. § 382.303 § 382.305: Random testing. continue driving while waiting for the results of the test § 382.303: Post-accident testing. criteria FMCSA regulations An employer must conduct drug and alcohol tests