*Question T1F08:
[97.3(a)(47)] What is the definition of third party communications?*  

*Correct Answer is  A: A message from a control operator to another amateur station control operator on behalf of another person*  

### AI Response: (may contain errors)  

The correct answer to the question about the definition of third-party communications is:

**A: A message from a control operator to another amateur station control operator on behalf of another person.**

### Explanation of the Correct Answer:
- **Third-party communications** refer to situations where a control operator (the person responsible for the operation of the station) relays messages for someone who is not a licensed amateur operator. This is allowed under certain conditions, and the control operator must ensure that the message complies with amateur radio regulations.

### Why the Other Choices are Incorrect:
- **B: Amateur radio communications where three stations are in communications with one another.**
  - This describes a scenario involving multiple stations but does not specifically address the concept of third-party communications. Third-party communications focus on relaying messages for someone who is not present or licensed.

- **C: Operation when the transmitting equipment is licensed to a person other than the control operator.**
  - This describes a situation where the equipment is licensed to someone else, but it does not define third-party communications. The key aspect of third-party communications is the relay of messages on behalf of another person, not the licensing of equipment.

- **D: Temporary authorization for an unlicensed person to transmit on the amateur bands for technical experiments.**
  - This refers to a different concept, which is not related to third-party communications. Unlicensed individuals cannot transmit on amateur bands, even for technical experiments, without specific authorization.

### Summary:
- Third-party communications involve a licensed control operator relaying messages for someone else.
- Understanding the definitions and regulations surrounding third-party communications is crucial for compliance with amateur radio rules. 

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