All members of the commission, and every other person appointed to office, or employed by the commission, shall, before entering upon the duties of his office or employment, take and subscribe to an oath or affirmation to support the Constitution of the United States and of this state, and to faithfully and honestly discharge the duties of such office or employment. No member of the commission, engineer, or other person appointed or employed by the commission shall, directly or indirectly, have any pecuniary interest in, or act as agent for, the sale of road or bridge building material, equipment, tools, machinery or supplies, or in any contract for the construction or maintenance of state highways or bridges, or the financing thereof, or in any performance bond or workers’ compensation or any other insurance furnished to the commission, or insurance furnished to any person, firm or corporation contracting with the commission. Any officer or employee of the commission who has custody or control of property or funds of the state, shall give a good and sufficient bond, in an amount and with sureties satisfactory to the commission, conditioned upon the faithful discharge of the duties of his office and upon the accounting for all property and funds coming into his hands by, through or from such office. Any officer or employee who shall violate the provisions of this section shall be guilty of a misdemeanor. The commission shall have power to remove any officer or employee of the commission. The selection and removal of all employees of the highways and transportation commission, of the transportation department, or of the department of transportation, shall be without regard to political affiliations.