When are you required to transmit your assigned call sign?
At the beginning of each contact, and every 10 minutes thereafter
At least once during each transmission
At least every 15 minutes during and at the end of a communication
At least every 10 minutes during and at the end of a communication✓Correct answer
Explanation
The rule sets a maximum interval of 10 minutes during a communication plus an identification at the end. It does not require identifying at the start of a contact or on every single transmission.