For purposes of this article, the Director of Finance may, by executive order, authorize the withdrawal from the General Fund of a sum of money not to exceed the amount of the unsold bonds that have been authorized by the committee to be sold pursuant to this article. Any sums withdrawn shall be deposited in the fund. All moneys made available under this section to the board shall be returned by the board to the General Fund, plus the interest that the amounts would have earned in the Pooled Money Investment Account, from the sale of bonds for the purpose of carrying out this article.