the private market, while (C) permitting individuals to remain invested in retirement bonds if they choose to do so. (6) Regulations The Secretary may issue such regulations as are necessary to carry out the purposes of this subsection and subsection (g), including— (A) establishment of procedures to communicate to individuals the importance of investment diversification and the transfer option described in subparagraph (B), (B) simplified procedures under which holders of retirement bonds may periodically choose to have the bonds or their proceeds transferred to available individual retirement plans, and (C) means by which individuals may elect (or be treated as electing) whether to have retirement bonds or their proceeds so transferred. Any such transfer shall be treated as a rollover contribution for purposes of section 408(d)(3) (other than subparagraph (B) thereof). (g) Retirement bond (1) Retirement bond For purposes of this section, the term retirement bond means a bond issued under chapter 31 of title 31, which by its terms, or by regulations prescribed by the Secretary under such chapter— (A) 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, (B) is not transferable, and (C) is designed for investment for retirement under automatic IRA arrangements or other savings vehicles. (2) Individual retirement plan rules applicable The provisions of this title applicable to an individual retirement plan (as defined in section 7701(a)(37)), including provisions relating to contributions, holding and distributions, shall apply to a retirement bond, except as determined by the Secretary. (3) Annual statement As soon as practicable after the close of the calendar year, the Secretary shall make available an annual statement to each participant setting forth— (A) payments made by or on behalf of the participant