Okla. Stat. tit. 70, § 5-139
School districts shall make payroll deductions for either or both professional organization dues and political contributions upon the request of any school employee and shall transmit deducted funds to the organization designated by the school district employee. Such deductions shall be on a ten-month basis unless otherwise designated by the employee organization.
Laws 1978, SB 454, c. 294, § 26, emerg. eff. May 10, 1977.