; (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; or (D) engaged in a combination of activities described in subparagraphs (A) through (C) to such an extent that, in the aggregate, such engagement is on such a full-time basis. The Secretary shall require the public housing agency or project owner, as applicable, to verify compliance with the requirement under this paragraph by each person occupying a dwelling unit assisted or administered by such agency or owner, as applicable, pursuant to a preference for housing assistance annually in conjunction with reviews of income for purposes of determining eligibility for assistance described in subsection (a). (2) Exceptions The requirement under paragraph (1) shall not apply to— (A) a person physically or mentally unfit for employment, as determined in accordance with such standards as the Secretary shall establish; (B) a parent or other household member responsible for the care of a dependent child under 6 or an incapacitated person