and spouse file a joint return for such taxable year and for the taxable year during which the spouse receives the distribution. (e) Applicable retirement savings vehicle (1) In general The term applicable retirement savings vehicle means— (A) an account or plan elected by the eligible individual under paragraph (2), or (B) if no such election is made, a retirement bond purchased by the Secretary for the benefit of the eligible individual. (2) Other retirement vehicles An eligible individual may elect to have the amount determined under subsection (a) contributed to an account or plan which— (A) is a Roth IRA (as defined in section 408A), or a designated Roth account (within the meaning of section 402A) of an applicable retirement plan (as defined in section 402A(e)(1)), (B) is for the benefit of the eligible individual, (C) accepts contributions made under this section, and (D) is designated by such individual (in such form and manner as the Secretary may provide) on the return of tax for the taxable year. (3) Retirement bond (A) In general For purposes of this section, the term retirement bond means a bond issued under chapter 31 of title 31, United States Code, which by its terms, or by regulations prescribed by the Secretary under such chapter— (i) provides for interest to be credited at rates that take into account the expected duration of the funds invested in retirement bonds and at rates determined or adjusted in a manner and with sufficient frequency to provide substantial protection from inflation, (ii) is not transferable, and (iii) is designed for investment for retirement. (B) Roth IRA rules applicable The provisions of this title applicable to a Roth IRA, including provisions relating to contributions, holding and distributions, shall apply to a retirement bond, except as determined by the Secretary. (C) Regulations The Secretary may issue such regulations as are necessary to carry out the purposes of this section, including— (i) establishment of procedures to communicate to individuals the