*Question T1A11:
[97.101 (d)] When is willful interference to other amateur radio stations permitted?*  

*Correct Answer is  B: At no time*  

### AI Response: (may contain errors)  

The correct answer to the question about willful interference to other amateur radio stations is **B: At no time**. 

### Explanation of the Correct Answer:
- **Willful interference** is defined as intentionally causing disruption to another station's communication. The FCC rules explicitly prohibit this behavior in all circumstances. Amateur radio operators are expected to operate in a manner that respects the rights of others and maintains the integrity of the communication service.

### Why the Other Choices are Incorrect:
- **A: To stop another amateur station that is breaking the FCC rules**  
  - This choice suggests that interference is permissible if it is to enforce rules. However, the responsibility to report violations lies with the FCC, not individual operators. Taking matters into your own hands by interfering is not allowed.

- **C: When making short test transmissions**  
  - This implies that brief transmissions could justify interference. However, even short test transmissions must not cause interference to other stations. All transmissions must comply with FCC regulations.

- **D: At any time, stations in the Amateur Radio Service are not protected from willful interference**  
  - This statement is misleading. While amateur stations must share the spectrum, they are protected from willful interference. The rules are designed to ensure that all operators can communicate without intentional disruption.

### Summary:
- Amateur radio operators must always avoid willful interference. The FCC rules are clear: respect for other operators is paramount, and any intentional disruption is prohibited. 

This understanding is crucial for passing the Extra Class exam and for responsible operation in the amateur radio service.