🔍 Key Concepts

• 46 CFR Part 16 – Chemical Testing • When random, periodic, pre-employment, and post-accident tests are required • Difference between tests tied to a specific event versus those done on a calendar schedule

💭 Think About

• Think about which types of tests are clearly mentioned in USCG drug and alcohol testing rules for mariners in safety-sensitive positions. • Ask yourself: which of these test types is tied to a regulatory trigger (like getting hired, being involved in an incident, or being in a random selection pool)? • Consider whether the regulations specify that mariners must be tested every year on a fixed schedule, or only at certain events and at random.

✅ Before You Answer

• Verify in 46 CFR 16.210–16.240 which test types are explicitly listed. • Check whether there is a specific requirement for a calendar‑based yearly test or if testing is instead event/random based. • Confirm that the test type you choose is not named as a required category in 46 CFR Part 16.