Every state, county, township, city, town, school district, or other officer under the laws of the state, and every deputy or assistant of any such officer, shall, before entering upon the duties of his office, take and subscribe to the following oath or affirmation:

"I,________, do solemnly swear (or affirm) that I will support, obey, and defend the Constitution of the United States, and the Constitution of the State of Oklahoma, and will discharge the duties of my office with fidelity; that I have not paid, or contributed, either directly or indirectly, any money or other valuable thing, to procure my nomination or election (or appointment), except for necessary and proper expenses expressly authorized by law; that I have not, knowingly, violated any election law of the state, or procured it to be done by others in my behalf; that I will not, knowingly, receive, directly or indirectly, any money or other valuable thing, for the performance or nonperformance of any act or duty pertaining to my office, other than the compensation allowed by law, and I further swear (or affirm) that I will not receive, use or travel upon any free pass or on free transportation during my term of office."

R.L. 1910, § 4270.