*Question E1D05:
[97.213(d)] What must be posted at the location of a station being operated by telecommand on or within 50 kilometers of the Earth’s surface?*  

*Correct Answer is  D: All these choices are correct*  

### AI Response: (may contain errors)  

In this question, we are dealing with the requirements for a station being operated by telecommand, which is a method of controlling a station remotely. According to FCC rules, specific information must be posted at the location of such a station.

### Explanation:

1. **Correct Answer: D - All these choices are correct**

   - **A: A photocopy of the station license**  
     This is required to ensure that the station is operating legally and that the license is available for inspection if needed.

   - **B: A label with the name, address, and telephone number of the station licensee**  
     This information is necessary so that the licensee can be contacted if there are any issues or questions about the station's operation.

   - **C: A label with the name, address, and telephone number of the control operator**  
     The control operator is responsible for the station's operation, so their contact information must be available for any operational concerns.

2. **Why the other choices are incorrect:**

   - Each individual choice (A, B, or C) alone does not satisfy the full requirement. All the information listed in choices A, B, and C must be posted to comply with the regulation.

3. **Useful Rule:**

   - **FCC Rule [97.213(d)]**: This rule specifies the requirements for posting information at a telecommand station. It ensures that all necessary parties can be contacted and that the station is operating within legal parameters.

By understanding these requirements, you ensure compliance with FCC regulations when operating a telecommand station.