A sinking fund call is a provision that allows a bond issuer to buy back its outstanding bonds before their maturity date at a pre-set price. A sinking fund can be used to pay for home repairs, save for a new car, pay for your vacation or cover large medical bills.Typically, you might set up a sinking fund for a substantial purchase that requires saving over time. , a large part of our domestic debt, in eighteen years. Let's talk about sinking funds, what they are, how they work and why you need them! Sinking Fund Requirement. There are ample resources now in the sinking fund to protect them and deferring payment for a time will not militate against the value of the bonds outstanding. How far may the courts go in the administration of law in controlling the enforcement of the judgment? The remaining mandatory sinking fund installments for the Term Bonds shall be adjusted pro rata. Revenues and the Sinking Fund Reserve.