All deeds, mortgages, or other instruments permitted or required by law to be registered, which prior to January 1, 1933, have been proved or acknowledged before a United States commissioner, or U.S. commissioner, are hereby in all respects validated as to such proof or acknowledgment, and all registrations of such deeds or conveyances, upon such probates, acknowledgments and private examinations, or any of them, are hereby declared to be sufficient and validated. (1953, c. 987.)