Final answer:
The chain of custody for urine samples must be documented on the back of the Custody and Control Form (CCF) from the time custody is taken until delivery to a post office or regional NSDL.
Step-by-step explanation:
The chain of custody for urine samples must be documented on the back of the Custody and Control Form (CCF) or other similar documentation from the time you take custody of the sample until the samples are delivered to a post office or regional National Screening Laboratory Division (NSDL).
When handling urine samples for drug testing or medical analysis, a strict chain of custody must be observed to ensure that the samples are not tampered with or mishandled. Every individual who handles the sample must record their information, including their name, the date and time they took custody of the sample, and when they transferred it to the next party. This chain continues until the sample reaches its final destination for testing.
The Custody and Control Form acts as a legal document that tracks the integrity of the sample through each step of the process. This procedure is vital to maintaining the legality and reliability of the test results.