; 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; and (bb) relevant timelines for review of such frameworks. (ii) Industry sector leaders and experts (I) In general Subject to subclause (II), the industry sector leaders and experts described in this clause are representatives of employers, industry associations, joint labor-management organizations, labor organizations, education and training providers, credential providers, program participants, national qualified intermediaries (including those supporting increased participation of nontraditional apprenticeship populations and nontraditional apprenticeship occupations) and other stakeholders relevant, as determined by the Administrator, to the sector or occupation for which the frameworks under clause (i) are being established or updated. (II) Work related to Sector 23 of the North American Industry Classification System In the case of an occupation or sector classified in sector 23 of the most recent publication of the North American Industry Classification System, not fewer than half of the industry sector leaders and experts involved in establishing or updating the applicable frameworks under clause (i) with respect to such occupation or sector shall be representatives of— (aa) labor organizations who represent employees primarily in the building trades and construction industry