rate of tax under such chapter (other than section 1401(b)) to such self-employment income, less the amounts specified in clause (2) of subsection (b) of this section for such fiscal year, and (III) the amount equivalent to the aggregate increase in tax liabilities under chapter 1 of the Internal Revenue Code of 1986 which is attributable to the application of sections 86 and 871(a)(3) of such Code to payments from the Trust Fund, over (ii) the sum of— (I) benefits paid from the Trust Fund during the fiscal year, and (II) amounts authorized to be made available from the Trust Fund under subsection (g) of this section which are paid from the Trust Fund during such fiscal year. (C) Notwithstanding paragraph (1), the balance in the Account shall not be available for investment by the Managing Trustee. (D) (i) The preceding provisions of this paragraph shall not apply with respect to fiscal years commencing with or after the first fiscal year, after fiscal year 2018, for which a provision of Federal law takes effect and authorizes, for amounts in the Trust Fund, an investment vehicle other than obligations of the United States. (ii) A provision of Federal law shall be deemed to meet the requirements of clause (i) if such provision includes the following: This Act shall be considered to be a provision of Federal law meeting the requirements of section 201(d)(2)(D)(i) of the Social Security Act. . . 3. Interim protections for Medicare part A trust fund surplus (a) In general Section 1817(c) of the Social Security Act ( 42 U.S.C. 1395i(c) ) is amended— (1) by striking It shall be the duty and inserting (1) Except as provided in paragraph (2), it shall be the duty