24 Pa. Stat. § 6-621
The board of school directors in any school district shall designate one or more banks or bank and trust companies as a depository or depositories for its school funds. No such depository shall be named unless it receives a majority of the votes of the entire school board elected or appointed in such district. Each such depository before receiving any of the school funds shall, except as hereinafter otherwise provided, furnish a proper bond, in such amount and with such surety or sureties as may be required, to be approved by the board of school directors, and conditioned upon the faithful keeping, paying out, and accounting for all of the school funds and property of said school district that may come into its hands, as well as for the payment of all interest on money deposited in such depository in accordance with any contract made by it with said school district.
24 P.S. § 6-621