71.2. Each contestant shall report to the sampling facility at the place and time specified by an official and shall, in the presence of the authorized person designated to take urine samples, provide a urine sample of at least 50 ml.
The person authorized pursuant to section 71.1 shall establish security measures to ensure the integrity of the chain of custody of the sample until it is submitted to the laboratory for analysis. The person shall record the chain of custody of the sample in a report.