; and (B) not deny, withhold, or delay such certifications due to the absence of a noise certification basis under such part, if the Administrator has developed appropriate noise measurement procedures for unmanned aircraft and the Administrator has received from the applicant the noise measurement results based on such procedures. (2) Duration The nonapplication of the noise certification requirements under paragraph (1) shall continue until the Administrator finalizes the noise certification requirements for unmanned aircraft in part 36 of title 14, Code of Federal Regulations, or another part of title 14 of such Code, as required under paragraph (3). (3) Associated UAS certification standards (A) Development of criteria Not later than 18 months after the date of enactment of this Act, the Administrator shall develop and establish substantive criteria and standard metrics to determine whether to approve an unmanned aircraft pursuant to part 36 of title 14, Code of Federal Regulations. (B) Substantive criteria and standard metrics In establishing the substantive criteria and standard metrics under subparagraph (A), the Administrator shall include criteria and metrics related to the noise impacts of an unmanned aircraft. (C) Publication The Administrator shall publish in the Federal Register and post on the website of the FAA the criteria and metrics established under subparagraph (A). (g) Concurrent reviews If the Administrator determines that the design, construction, maintenance and operational sustainability, airworthiness approval, or operational approval of an unmanned aircraft require environmental assessments, including under the requirements of the National Environmental Policy Act of 1969 ( 42 U.S.C. 4321 et seq. ), the Administrator shall, to the maximum extent practicable, conduct such reviews and analyses concurrently. (h) Third-party support In implementing subsection (a), the Administrator shall allow for the engagement of approved specialized third parties, as appropriate, to support an