Employers are advised to have a clear and concise written drug testing policy and to abide by state laws to avoid litigation. Employers may still test for and/or discipline an employee for marijuana under certain circumstances (e.g., post-accident). Oklahoma medical marijuana SQ 788 does not permit an employer to discipline or terminate a cardholding medical marijuana employee based solely on the presence of marijuana in a drug test. Regardless of a cardholder status, employers are not permitted to bring marijuana to their place of work or be under the influence during their hours of work. If an employee's job is covered by federal guidelines, then they must abide by the federal regulations in order for the company to remain in compliance with federal guidelines, regardless of state laws. Medical marijuana is not a medical exception under the U.S. DOT drug testing regulations, and federally mandated employers are expected to follow federal guidelines.