Okla. Const. art. XV, § 2

Administration and filing of oath - Refusal to take - False swearing. The foregoing oath shall be administered by some person authorized to administer oaths, and in the case of State officers and judges of the Supreme Court, shall be filed in the office of the Secretary of State, and in case of other judicial and county officers, in the office of the clerk of the county in which the same is taken; any person refusing to take said oath, or affirmation, shall forfeit his office, and any person who shall have been convicted of having sworn or affirmed falsely, or having violated said oath, or affirmation, shall be guilty of perjury, and shall be disqualified from holding any office of trust or profit within the State. The oath to members of the Senate and House of Representatives shall be administered in the hall of the house to which the members shall have been elected, by one of the judges of the Supreme Court, or in case no such judge is present, then by any person authorized to administer oaths.