; and (B) the public housing agency shall issue rental assistance to the eligible recipient. (5) Priority in the case of a major disaster In issuing rental assistance under paragraph (4)(B), an eligible public housing agency shall prioritize the eligible recipients described in subsection (a)(4)(A)(ii). (6) Incremental increase in rental contribution (A) In general The Secretary may require that the rental contribution of an eligible recipient receiving rental assistance incrementally increases beginning on the date that is 1 year after the date on which the first rental payment on a housing unit using the rental assistance occurs. (B) Frequency An increase described in subparagraph (A) may occur not more frequently than quarterly. (C) Amounts (i) First increase The first increase described in subparagraph (A) shall be in an amount that ensures that an eligible recipient contributes not more than 30 percent of the adjusted income of the eligible recipient towards a rental unit. (ii) Final increase The final increase described in subparagraph (A) shall be in an amount that ensures that an eligible recipient contributes not more than 40 percent of the adjusted income of the eligible recipient towards a rental unit. (D) Decrease At any time, the Secretary may reduce a rental contribution of an eligible recipient receiving rental assistance if the adjusted income of the eligible recipient decreases suddenly. (E) Limit An eligible recipient may not be required to contribute more than 40 percent of the adjusted income of the eligible recipient towards a rental unit paid for with rental assistance. (7) Tribally designated housing entities In the case of an eligible recipient that is eligible as a result of a trigger event described in subsection (a)(12)(C), a Tribally designated housing entity may be considered a public housing agency for the purpose of this section. (8) Reasonable rent The rental price for a housing unit paid for with rental assistance shall be reasonable in comparison with rents charged for comparable