Okla. Stat. tit. 74, § 1309

A. Any eligible employee may elect to have a dependent or dependents of the employee covered by the health insurance plan and dental insurance plan or by any available health maintenance organization (HMO) approved by the Oklahoma Health Care Authority. The employee may elect to cover all dependent children and not elect to cover the spouse of the employee. Such election shall be made at the time the employee becomes enrolled in the Plan, under such procedures as the Authority may establish. If dependent coverage is not elected or if the employee elects to cover all dependent children and not the spouse of the employee at the time an employee becomes enrolled in the Plan, dependent coverage or coverage for the spouse cannot be elected until the next enrollment period or until a qualifying event has occurred as established by the Authority. Such subsequent election of dependent coverage shall be made under such conditions as the Authority may impose. If electing not to cover the spouse, the employee shall submit a statement signed by both the employee and the spouse acknowledging their choice not to provide insurance coverage for the spouse under the health insurance plan and dental insurance plan or approved HMO plans. B. Any employee with dependent coverage, as provided in this section, who has a change in the number of dependents may at the time of such change increase or decrease the number of dependents covered by the health insurance plan and dental insurance plan or approved HMO plans, under procedures established by the Authority. C. Any employee who has no eligible dependents at the time the employee becomes enrolled may elect dependent coverage at the time the dependency status of the employee changes under procedures established by the Authority.