Minn. Stat. § 354.543
Subd. 1. Service credit purchase authorized.
(b) A service credit purchase is prohibited if:
Subd. 2. Application and documentation.
A teacher who desires to purchase service credit under subdivision 1 must apply with the executive director to make the purchase. The application must include all necessary documentation of the teacher's qualifications to make the purchase, signed written permission to allow the executive director to request and receive necessary verification of applicable facts and eligibility requirements, and any other relevant information that the executive director may require.
Subd. 3. Service credit grant.
Allowable and formula service credit for the purchase period must be granted by the Teachers Retirement Association to the purchasing teacher upon receipt of the purchase payment amount. Payment must be made before the teacher's termination of teaching service. Purchasing allowable and formula service credit under this section does not change the date the teacher first became a member of the association for the purpose of computing an annuity under section 354.44, subdivision 6.