Until otherwise provided by law, notaries public appointed under the laws of the Territory of Oklahoma, or under the authority of the laws heretofore in force in the Indian Territory, may continue to exercise and perform the duties of the office of notary public until the expiration of their commissions: Provided, That any notary public appointed in the Indian Territory for any district, or in the Territory of Oklahoma for any county, shall, after this Constitution takes effect, exercise the powers, privileges, and rights of a notary public only of the county formed in whole or in part out of the district or county for which such person is a notary public, and in which such person resides at the time the State is admitted into the Union; but before any such notary public, except notaries public for those counties in the Territory of Oklahoma, the boundaries of which have not been changed by the Constitution, shall exercise the powers, privileges, and rights of a notary public of such county, he shall have filed in the office of the county clerk of the county in which he resides his commission as notary public and an affidavit stating that he is a resident of such county, whereupon he shall become a notary public for such county.