College savings bonds shall not be issued in any given fiscal year in an aggregate principal amount greater than one-third of the total aggregate principal amount of general obligation bonds projected to be issued by the Commonwealth during that fiscal year or $100,000,000, whichever is greater. For purposes of calculating the aggregate principal amount of college savings bonds for purposes of this chapter or for calculating debt within the meaning of any constitutional or statutory limitation on the incurring of debt, the aggregate principal amount of any discount bond shall be the aggregate of the initial offering prices at which such bonds are offered for sale to the public, without reduction for underwriter's discount or other expenses.