whose principal residence is located in an area for which, under the rule published in the Federal Register on November 16, 2016 (81 Fed. Reg. 80567), the small area fair market rent is used for purposes of the Housing Choice Voucher Program, the table contained in subparagraph (A) shall be applied by substituting $125,000 for $100,000 each place it appears. (2) Partial year residence The Secretary shall prescribe such rules as are necessary to carry out the purposes of this section for taxpayers with respect to whom a residence is a principal residence for only a portion of the taxable year. (3) Special rule for individuals residing in government-subsidized housing In the case of a principal residence— (A) the rent with respect to which is subsidized under a Federal, State, local, or tribal program, and (B) with respect to which the taxpayer elects the application of this paragraph, in lieu of the credit determined under subsection (a), there shall be allowed as a credit against the tax imposed by this subtitle for such taxable year an amount equal to 1/12 of the amount of rent paid by the taxpayer (and not subsidized under any such program) during the taxable year with respect to such residence. (4) Rent The term rent includes any amount paid for utilities of a type taken into account for purposes of determining the utility allowance under section 42(g)(2)(B)(ii). . (b) Clerical amendment The table of sections for subpart C of part IV of subchapter A of chapter 1 of the Internal Revenue Code of 1986 is amended by inserting after the item relating to section 36B the following new item: Sec. 36C. Rent paid for principal residence. . (c) Effective date The amendments made by this section shall apply with respect to taxable years beginning after December 31, 2017.