; (2) tenant-based assistance under section 8(o), pursuant to paragraph (6)(A)(i) of such section; (3) project-based assistance under section 8(o)(13), pursuant to subparagraph (J) of such section; and (4) occupancy in a dwelling unit in a project assisted with project-based assistance under section 8, pursuant to subsection (d)(1)(A)(i) of such section. (b) Early application for assistance Notwithstanding the period during which a preference for housing assistance is provided for a person, an otherwise eligible person may apply for such occupancy or assistance at any time after such person attains 16 years of age. (c) Requirement for employment, education, or training (1) In general Except as provided in paragraph (2), each person occupying a dwelling unit pursuant to a preference for housing assistance shall be, not later than 12 months after such initial occupancy and for at least 9 months of each successive 12-month period thereafter— (A) employed on average at least 35 hours of service per week; (B) engaged in vocational, technical, or workforce development training or in an apprenticeship, on a full-time basis, as classified by a vocational, technical, or workforce development training institution or entity; (C) enrolled in a secondary school, an institution of higher education, or other institution providing post-secondary education, on a full-time basis, as classified by an educational institution