(AP) — The Nebraska School Activities Association (NSAA) says no students have exercised a policy approved in December that opens the door for participation in high school athletics by transgender students.

The policy requires students who want to participate in a sport with members of the opposite sex to prove their gender identity through the testimony of experts, such as psychologists.

NSAA Executive Director Rhonda Blanford-Green says no such requests have been made. She says the association passed the policy in December in anticipation of the issue eventually arising.

The association’s board plans to vote next month to finalize adoption of the policy.