T1F02:How often must you identify with your FCC-assigned call sign when using tactical call signs such as “Race Headquarters”?
Direct answer summary (2026-2030 NCVEC pool)
The official correct answer for T1F02 is At least every 10 minutes during and at the end of a communication.
Use this action or method: At least every 10 minutes during and at the end of a communication. It is the choice that directly completes the job described in the question.