Okla. Stat. tit. 13, § 13-201: Free choice of sureties by employees

No common carrier authorized to do business in this state, when

requiring of an employee a bond or undertaking of any nature

whatever, shall require such employee to have such bond or

undertaking executed as surety by any particular person, company,

corporation, association, or firm, or by any one or more of any

number of such persons, companies, corporations, associations or

firms named by such common carrier; and no such common carrier shall

reject any such bond or undertaking for any reason other than the

financial insufficiency of such bond or undertaking.