; and (II) except as provided in clause (ii), make a determination, not later than 45 days after receipt of such application, in accordance with such section on whether to provide such approval. (ii) Estimated timeline If the Administrator does not make a determination under clause (i)(II) within 45 days of receipt of the application under section 121(a), the Administrator shall provide the applicant with— (I) a written explanation for the delay; and (II) an estimated timeline for a determination that is not more than 90 days after the date of such written explanation. (iii) Review The Administrator— (I) shall regularly review each occupation suitable for apprenticeship to ensure that the occupation is in compliance with the national occupational standards established or updated under subparagraph (B)(i); and (II) may, if the Administrator determines through such review that the occupation is no longer in compliance, withdraw the approval of the occupation. (B) National occupational standards (i) In general Using funds appropriated under section 141(a), the Administrator shall, on an ongoing basis and taking into consideration recommendations of the Advisory Committee under section 112(d)(4), convene relevant representatives described in clause (ii) to establish or update frameworks for national occupational standards for occupations suitable for apprenticeship (including potential occupations) that— (I) meet the requirements of this Act; and (II) describe— (aa) program scope and length, required related instruction, required on-the-job training, recognized postsecondary credentials awarded through such apprenticeship, and competencies achieved through such apprenticeship