*Question T1C11:
[97.21(b)] If your license has expired and is still within the allowable grace period, may you continue to transmit on the amateur radio bands?*  

*Correct Answer is  D: No, you must wait until the license has been renewed*  

### AI Response: (may contain errors)  

The correct answer to the question is:

**D: No, you must wait until the license has been renewed.**

### Explanation:

1. **Why the correct answer is correct:**
   - When your amateur radio license expires, you are not allowed to transmit on the amateur bands until your license has been renewed. The grace period allows you to renew your license without having to retake the exam, but it does not permit you to operate while the license is expired.

2. **Why the other choices are incorrect:**
   - **A: Yes, for up to two years**: This is incorrect because, while there is a grace period for renewal, it does not allow for operation during that time. You cannot transmit until the license is renewed.
   - **B: Yes, as soon as you apply for renewal**: This is incorrect because simply applying for renewal does not grant you the right to operate. You must wait until the renewal is processed and your license is active again.
   - **C: Yes, for up to one year**: This is also incorrect. The grace period does not allow for any operation; it only allows for renewal without retaking the exam.

### Useful Rules of Thumb:
- Always ensure your license is current before transmitting.
- Familiarize yourself with the renewal process and timelines to avoid lapses in your operating privileges. 

This understanding is crucial for maintaining compliance with FCC regulations and ensuring responsible amateur radio operation.