24 Pa. Stat. § 658
All elections heretofore held by any school district of the third class, within this Commonwealth, to increase its indebtedness under the provisions of an act, approved the twentieth day of April, one thousand eight hundred and seventy-four (Pamphlet Laws, sixty-five), entitled "An act to regulate the manner of increasing the indebtedness of municipalities, to provide for the redemption of the same, and to impose penalties for the illegal increase thereof," and under the acts amendatory thereof, where the majority of votes required by law cast at such election was in favor of the proposed increase of indebtedness, be, and the same are hereby, ratified, confirmed, and made valid, notwithstanding the fact that such election was not preceded by a special registration of electors. All bonds issued or to be issued in pursuance of every such election are hereby made binding obligations of every such school district of the third class, provided all the other requirements of the law concerning such elections and issue of bonds have been complied with.
24 P.S. § 658