Which of the following is true regarding FCC proof-of-performance?

The correct answer points to the specific requirements set by the FCC regarding proof-of-performance tests, especially concerning the 24-hour carrier-level variation. The FCC mandates that these tests must be conducted in July or August and December or January. This seasonal requirement is in place to account for variations in performance associated with environmental factors and usage patterns that can influence signal transmission and reception during different times of the year.

In contrast, conducting tests at any time of the year does not align with the FCC’s specific regulatory frame, as it emphasizes the need for testing during particular months to ensure consistency and reliability in performance assessments.

The notion that tests must be done only once a year overlooks the necessity of ongoing evaluation of performance which the FCC requirements implicitly support. Additionally, the idea that all tests must be performed by an outside contractor does not reflect the FCC's regulations, as it allows for some flexibility in who conducts these tests.

Thus, the requirement for conducting tests during the specified months is grounded in regulatory compliance, ensuring that evaluations are relevant and accurate concerning varying seasonal conditions.