Okla. Stat. tit. 74E § 2.95
Every candidate committee, political action committee and political party committee shall maintain a campaign account in each campaign depository in the name of the committee as it is registered with the Commission. All contributions to a committee except in-kind contributions, including contributions by a candidate to his or her candidate committee, shall be deposited in a campaign account. All expenditures made by a committee shall be made on a check or by debit card, signed by the candidate, Treasurer or Deputy Treasurer of a candidate committee and by the Treasurer or Deputy Treasurer of a political action committee. Provided, however, a candidate may authorize other individuals to sign checks or debit cards for the candidate's committee; however, the candidate, the Treasurer and Deputy Treasurer shall remain responsible for the lawful expenditure of committee funds. Checks for a political action committee shall include the identification number of the committee assigned by the Commission. A campaign account may earn interest paid by the financial institution in which the account is maintained, but campaign funds shall not be invested in any other way. Contributions from corporations, labor unions, a limited liability company that has one or more corporate members or a partnership that has one or more corporate partners shall not be commingled with other contributions made to a candidate committee, a limited committee or a political party committee.
Okla. Stat. tit. 74E, § 2.95