*Question E1B11:
[97.15] What does PRB-1 require of state and local regulations affecting amateur radio antenna size and structures?*  

*Correct Answer is  B: Reasonable accommodations of amateur radio must be made*  

### AI Response: (may contain errors)  

PRB-1 is a memorandum from the Federal Communications Commission (FCC) that addresses the issue of state and local regulations affecting amateur radio antennas. Here's a breakdown of the correct answer and why the other choices are incorrect:

1. **Correct Answer: B: Reasonable accommodations of amateur radio must be made**

   - **Explanation**: PRB-1 requires that state and local governments must reasonably accommodate amateur radio communications. This means that while local authorities can regulate the placement, height, and construction of antennas, they must do so in a way that does not preclude amateur radio operations. The regulation should allow for effective amateur radio communication.

2. **Why the Other Choices are Incorrect**:

   - **Choice A: No limitations may be placed on antenna size or placement**
     - **Explanation**: This is incorrect because PRB-1 does not prohibit all limitations. It allows for reasonable regulations, as long as they do not impede the ability to communicate effectively.

   - **Choice C: Such structures must be permitted when use for emergency communications can be demonstrated**
     - **Explanation**: This is incorrect because PRB-1 does not specifically require that antennas be permitted only for emergency communications. The rule applies more broadly to amateur radio operations in general.

   - **Choice D: Such structures must be permitted if certified by a registered professional engineer**
     - **Explanation**: This is incorrect because PRB-1 does not require certification by a professional engineer for antenna structures. The focus is on reasonable accommodation rather than engineering certification.

3. **Useful Rule of Thumb**:

   - When dealing with local zoning laws, remember that PRB-1 supports the idea that amateur radio operators should be able to install antennas that allow for effective communication, but within the bounds of reasonable local regulations. Always check local laws and work with authorities to find a solution that meets both regulatory and operational needs.