Okla. Stat. tit. 74, § 74-456.2: Joint committees of Legislature may be established

In addition to those joint committees provided by law, the

President Pro Tempore of the Senate and the Speaker of the House of

Representatives shall be authorized to establish joint committees of

the Legislature as they deem necessary. Said joint committees shall

be composed of members from the Senate to be appointed by the

President Pro Tempore of the Senate, and members from the House to

be appointed by the Speaker of the House of Representatives. Joint

committees and subcommittees of joint committees shall be authorized

to meet when the Legislature is not in session, subject to such

restrictions as may be imposed by the President Pro Tempore of the

Senate and the Speaker of the House of Representatives. Members of

the Legislature and the officers thereof shall be reimbursed their

expenses in attending meetings of joint committees and subcommittees

of joint committees of which they are members or to which they are

invited by committee chairmen when the Legislature is not in

session.