Senate Bill 217 amends provisions of the Transportation Code relating to the alcohol and drug testing of a holder of a commercial driver's license. Current law requires a trucking company to perform alcohol and drug tests on all its drivers but does not include other holders of a commercial driver's license, such as bus drivers. Senate Bill 217 requires an employer who is required by federal safety regulations to conduct alcohol and drug tests on employees holding a commercial driver's license to report a valid positive test result, a license holder's refusal to provide a specimen for the test, or the provision of an adulterated, diluted, or substituted specimen to the Department of Public Safety (DPS). The bill requires DPS to maintain the information and makes the information confidential and subject to release only to certain persons.