*Question T1E11:
[97.103(a)] Who does the FCC presume to be the control operator of an amateur station, unless documentation to the contrary is in the station records?*  

*Correct Answer is  D: The station licensee*  

### AI Response: (may contain errors)  

The correct answer to the question is **D: The station licensee**. 

### Explanation:

1. **Why the correct answer is correct:**
   - The FCC presumes that the station licensee is the control operator of an amateur station. This means that the person who holds the license for the station is responsible for its operation and compliance with FCC rules. Unless there is documentation indicating otherwise, the licensee is assumed to be in control of the station.

2. **Why the other choices are incorrect:**
   - **A: The station custodian**: A custodian may manage the physical aspects of the station but does not have the authority or responsibility for its operation unless they are also the licensee.
   - **B: The third party participant**: A third party can operate the station under certain conditions, but they do not have the presumption of being the control operator unless designated by the licensee.
   - **C: The person operating the station equipment**: While this person may be physically operating the equipment, they are not automatically the control operator unless they are the licensee or have been designated as such.

### Summary:
- The control operator is presumed to be the station licensee unless stated otherwise in the station records. This ensures accountability and compliance with regulations. 

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