or 408(d)(3). (5) Coordination with periods specified by the Secretary Any period described in paragraph (1) with respect to any person (including by reason of the application of paragraph (4)) shall be in addition to (or concurrent with, as the case may be) any period specified under subsection (a) or (b) with respect to such person. . (b) Effective date The amendment made by this section shall apply to federally declared disasters declared after the date of the enactment of this Act. 306. Modification of the tax rate for the excise tax on investment income of private foundations (a) In general Section 4940(a) is amended by striking 2 percent and inserting 1.39 percent . (b) Elimination of reduced tax where foundation meets certain distribution requirements Section 4940 of such Code is amended by striking subsection (e). (c) Effective date The amendments made by this subsection shall apply to taxable years beginning after the date of the enactment of this Act. 307. Additional low-income housing credit allocations for qualified 2017 and 2018 California disaster areas (a) In general For purposes of section 42 of the Internal Revenue Code of 1986, the State housing credit ceiling for California for calendar year 2019 shall be increased by the lesser of— (1) the aggregate housing credit dollar amount allocated by the State housing credit agencies of California for such calendar year to buildings located in qualified 2017 and 2018 California disaster areas, or (2) 50 percent of the sum of the State housing credit ceilings for California for calendar years 2017 and 2018. (b) Allocations treated as made first from additional allocation for purposes of determining carryover For purposes of determining the unused State housing credit ceiling for any calendar year under section 42(h)(3)(C) of the Internal Revenue Code of 1986, any increase in the State housing credit ceiling under subsection (a) shall be treated as an amount described in clause (ii) of such section. (c) Definitions For purposes of this section— (1)