Notwithstanding any provision of law to the contrary, the Commonwealth, all public officers, municipal corporations, other political subdivisions and all other public bodies of the Commonwealth may invest any and all moneys belonging to them or within their control, in certificates representing ownership of either treasury bond principal at maturity or its coupons for accrued periods. The underlying United States Treasury bonds or coupons shall be held by a third-party independent of the seller of such certificates.