*Question G0A06:
[97.13(c)(2), 1.1307(1)(b)(3)(i)] What must you do if your station fails to meet the FCC RF exposure exemption criteria?*  

*Correct Answer is  A: Perform an RF exposure evaluation in accordance with FCC OET Bulletin 65*  

### AI Response: (may contain errors)  

When your station does not meet the FCC RF exposure exemption criteria, you must ensure that your station complies with the FCC's RF exposure limits. The correct procedure is to perform an RF exposure evaluation using the guidelines provided in the FCC's Office of Engineering and Technology (OET) Bulletin 65.

1. **Why the correct answer is correct:**

   - **Correct Answer: A**  
     Performing an RF exposure evaluation in accordance with FCC OET Bulletin 65 is the required action. This bulletin provides detailed guidance on how to evaluate RF exposure levels and ensure compliance with FCC regulations. It includes methods for calculating exposure levels and determining safe distances from antennas.

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

   - **Choice B: Contact the FCC for permission to transmit**  
     This is incorrect because the FCC does not grant permission to transmit based on RF exposure concerns. Instead, it requires operators to ensure compliance with exposure limits.

   - **Choice C: Perform an RF exposure evaluation in accordance with World Meteorological Organization guidelines**  
     This is incorrect because the World Meteorological Organization does not provide guidelines for RF exposure evaluations. The FCC's guidelines are the relevant standards for amateur radio operators in the United States.

   - **Choice D: Use an FCC-approved band-pass filter**  
     This is incorrect because a band-pass filter does not address RF exposure issues. Band-pass filters are used to limit the frequency range of signals, not to reduce exposure levels.

3. **Useful Formulas or Rules of Thumb:**

   - The FCC OET Bulletin 65 provides methods to calculate the power density ($S$) at a given distance from an antenna:
     $$S = \frac{P_T \times G}{4 \pi r^2}$$
     where:
     - $S$ = power density in watts per square meter (W/m²)
     - $P_T$ = transmitter power in watts
     - $G$ = antenna gain (linear)
     - $r$ = distance from the antenna in meters

   - Ensure that the calculated power density does not exceed the maximum permissible exposure (MPE) limits specified by the FCC for the frequency of operation.

By following these guidelines, you can ensure that your station operates safely and in compliance with FCC regulations.