Every election heretofore held in any county in this state submitting to the qualified electors of such county the question of the levy of a special tax for public hospital purposes pursuant to the provisions of Amendment 72 to the Constitution of Alabama at which a majority of the votes cast were in favor of the levy of the said tax, but which was irregular because of failure to comply with the procedural requirements prescribed by general or local election laws applicable thereto or in the call thereof by the county commission of such county, including, but without limiting the generality of the foregoing, any requirements concerning the time and manner of giving notice thereof, canvassing and recording the results thereof or the appointment of election officials therefor, shall be, and every such election hereby is, validated and given effect in like manner as if all such procedural requirements had been duly and legally complied with; provided, that this section shall not apply to any election which, prior to September 12, 1966, has been found to be invalid by the county commission of the county wherein the election was held, or held invalid by a final judgment of any court of competent jurisdiction or to any election the validity of which is at issue in any action pending in a court of competent jurisdiction as of September 12, 1966.