Okla. Stat. tit. 70 § 17-122
When a member of the Teachers' Retirement System of Oklahoma makes an application to retire, the System shall provide to such member an application to participate in a retired teachers' organization along with a form allowing the member to elect to have annual membership dues in a retired teachers' organization prorated and authorizing the System to withhold such dues monthly from the member's retirement benefits. Any retired teachers' organization which wants to participate, pursuant to this section, or to participate in a general mailing to all retired educators, with the approval of the Board of Trustees of the Teachers' Retirement System, shall provide to the System and pay for the cost, including postage costs if required by the Teachers' Retirement System, of printed materials and of the applications to be a member of the organization and the forms authorizing the System to withhold membership dues of the organization. The Board of Trustees shall approve the format and content of the authorization to make sure it complies with all relevant legal requirements. The System shall not be held responsible or liable for not providing the application to be a member of a participating retired teachers' organization or the authorization form if such organization does not timely provide to the System such materials and applications and approved authorization forms in sufficient quantities to meet the retirement application demands of the retiring members.
Okla. Stat. tit. 70, § 17-122