Any and all such contracts executed prior to September 13, 1941, by and between such districts and all acts of boards of directors and other officers of such districts leading up to and including the execution of such contract or contracts, are hereby legalized, ratified, confirmed and declared valid to all intents and purposes, and the power of such districts to execute, carry out, perform and observe such contracts and every provision thereof is hereby ratified, confirmed and declared valid and such contracts are hereby declared to be in all respects the legal and binding obligations of, against and in favor of each of such contracting districts.