individual, or (V) is, or was immediately prior to attaining the age of majority— (aa) an emancipated minor or in legal guardianship as determined by a court of competent jurisdiction in the individual's State of legal residence, (bb) under the care and placement responsibility of the State agency responsible for administering a plan under part B or part E of title IV of the Social Security Act, or (cc) was an unaccompanied youth (within the meaning of section 725(6) of the McKinney-Vento Homeless Assistance Act ( 42 U.S.C. 11434a(6) )) or a homeless child or youth (within the meaning of section 725(2) of such Act ( 42 U.S.C. 11434a(2) )). (E) Owner-occupied buildings having 4 or fewer units eligible for credit where development plan (i) In general Subparagraph (C) shall not apply to the acquisition or rehabilitation of a building pursuant to a development plan of action sponsored by a State or local government or a qualified nonprofit organization. (ii) Limitation on credit In the case of a building to which clause (i) applies, the applicable fraction shall not exceed 80 percent of the unit fraction. (iii) Certain unrented units treated as owner-occupied In the case of a building to which clause (i) applies, any unit which is not rented for 90 days or more shall be treated as occupied by the owner of the building as of the 1st day it is not rented. (2) New building The term new building means a building the original use of which begins with the taxpayer. (3) Existing building The term existing building means any building which is not a new building. (4) Application to estates and trusts In the case of an estate or trust, the amount of the credit determined under subsection (a) shall be apportioned between the estate or trust and the beneficiaries on the basis of the income of the estate or trust allocable to each. (5) Impact of tenant's option to acquire property (A) In general No Federal income tax benefit shall fail to be allowable to the taxpayer with respect to any qualified middle-income building merely by