; (2) review, and if necessary update, existing policies in accordance with the standards developed under paragraph (1); and (3) establish a process under which appropriate onsite airport personnel or an aviation official may, with appropriate manufacturer training or alternative training as determined by the Administrator, be permitted to conduct the minimum triannual preventative maintenance checks under the advisory circular for non-Federal automated weather observing systems (AC 150/5220–16E) and any other similar, successor checks. (b) Permission Permission to conduct the minimum triannual preventative maintenance checks described under subsection (a)(3) and any similar, successor checks shall not be withheld but for specific cause. (c) Standards In updating the standards under subsection (a)(1), the Administrator shall— (1) ensure the standards are performance-based; (2) use risk analysis to determine the accuracy of the automated weather observing systems outputs required for pilots to perform safe aircraft operations; and (3) provide a cost-benefit analysis to determine whether the benefits outweigh the cost for any requirement not directly related to safety. (d) AIP eligibility of AWOS equipment (1) In general Notwithstanding any other law, the Administrator is authorized to and shall waive any positive benefit-cost ratio requirement for automated weather-observing system equipment under subchapter I of chapter 471, of title 49, United States Code, if— (A) the airport sponsor or State, as applicable, certifies that a grant for such automated weather observing systems equipment under that chapter will assist an applicable airport to respond to regional emergency needs, including medical, firefighting, and search and rescue needs; (B) the Secretary determines, after consultation with the airport sponsor or State, as applicable, that the placement of automated weather-observing equipment at the airport will not cause unacceptable radio frequency congestion