In all cases where a conveyance, contract, agreement or other instrument of writing has heretofore been acknowledged or proved before any commissioned officer in the services of the United States armed forces, such acknowledgment or affidavit is hereby declared to be good, valid and binding to the same extent and with like effect as though such conveyance, contract, agreement, or other instrument of writing had been acknowledged or proved before any officer authorized by law to take acknowledgments in the State of Mississippi.