53 Pa. C.S. § 8261
If a local government unit having outstanding any general obligation bonds or notes or guaranteed revenue bonds or notes, lease rental debt or guaranty of authority obligations fails or refuses to make adequate provision in its budget for any fiscal year for the sums payable in respect of the bonds or notes, lease rental or guaranty in the year or fails to appropriate or pay the moneys necessary in that year for the payment of the amount of the lease rental or guaranty, as the case may be, of the maturing principal of and the interest on the bonds or notes or any of them, or any tax anticipation notes, or any sinking fund obligation for the bonds or notes or tax anticipation notes, or guaranty or the lease rental payment coming due in the fiscal year of the budget or for which the appropriations or payments should have been made, then at the suit of the holder of any bond, note or tax anticipation note or coupon or guaranty, or the holder of any authority obligation secured by a lease evidencing the acquisition of a capital asset or of any taxpayer of the local government unit, the court of common pleas shall, after a hearing held upon such notice to the local government unit as the court may direct and upon a finding of such failure or neglect, by order of mandamus require the treasurer of the local government unit to pay into the sinking fund for each series of bonds or notes then outstanding, or for each guaranty or lease rental payment, the first tax moneys or other available revenues or moneys thereafter received in the fiscal year by the treasurer, equally and ratably for each series for which provision has not been made in proportion to debt service for the year on each series then outstanding, or the amounts due upon guaranties or as payments with respect to lease rental debt, as the case may be. Any priority on incoming tax moneys accorded to a separate sinking fund for tax anticipation notes under the authority of section 8125 (relating to security for tax anticipation notes and sinking fund) shall not be affected by this provision until the sum on deposit in each sinking fund equals the moneys that should have been budgeted or appropriated for each series.
53 Pa.C.S. § 8261