; and (B) materials that meet, at a minimum, conformance to Level AA of the Web Content Accessibility Guidelines 2.0 of the Web Accessibility Initiative (or any successor guidelines). (5) The program awards a certificate of completion in recognition of successful completion of the program, evidenced by an appropriate certificate issued by the registration agency, and in the case of apprenticeships and youth apprenticeships, prepares a program participant to obtain a recognized postsecondary credential. (6) The program provides that an individual who is to become a program participant under the program enters into a written apprenticeship agreement described in section 123 with the sponsor of the program. (7) The numeric ratio of program participants to supervisors (such as journeyworkers, mentors, or on-the-job learning instructors, as applicable) for the occupation suitable for apprenticeship— (A) is, except in the case of a program in a rural area that demonstrates need or a shortage of available individuals to serve as supervisors, based on evidence-based and evidence-informed best practices for supervision, training, safety, and continuity of employment, throughout the work processes of the program, job site, department, or plant, appropriate for the degree of hazard in different occupations; (B) except if such ratios are expressly prohibited by a collective bargaining agreement, is consistent with provisions in any applicable collective bargaining agreements