; and (ii) the revenue from such tax should be appropriated to the Fund. (2) Voluntary contributions Voluntary contributions to the Fund. (3) Other deposits Amounts deposited into the Fund under— (A) section 513(c) (relating to exceptions to contribution requirements); (B) section 521(c) (relating to remittance of allocations from the Fund); (C) section 533 (relating to violations); and (D) any other section of this Act. (4) Investment returns Interest on, and the proceeds from, the sale or redemption of, any obligations held by the Fund under subsection (c). (c) Investment The Commission shall invest portions of the Fund in obligations of the United States in the same manner as provided under section 9602(b) of the Internal Revenue Code of 1986. (d) Use of Fund (1) In general The sums in the Fund shall be used to provide benefits to participating candidates as provided in subtitle C. (2) Insufficient amounts Under regulations established by the Commission, rules similar to the rules of section 9006(c) of the Internal Revenue Code shall apply. B Eligibility and certification 511. Eligibility (a) In general A candidate for Senator is eligible to receive an allocation from the Fund for any election if the candidate meets the following requirements: (1) The candidate files with the Commission a statement of intent to seek certification as a participating candidate under this title during the period beginning on the Fair Elections start date and ending on the last day of the Fair Elections qualifying period. (2) The candidate meets the qualifying contribution requirements of section 512. (3) Not later than the last day of the Fair Elections qualifying period, the candidate files with the Commission an affidavit signed by the candidate and the treasurer of the candidate's principal campaign committee declaring that the candidate— (A) has complied and, if certified, will comply with the contribution and expenditure requirements of section 513; (B) if certified, will comply with the debate requirements of section 514