Minn. Stat. § 355.625
In accord with section 218(d)(6)(f) of the Social Security Act and when the legislators retirement plan or the elective state officers retirement plan, whichever applies, is divided into two parts or divisions, a legislator or constitutional officer who does not desire coverage under an agreement under section 218(d) of the Social Security Act may be transferred to the other part or division if the agreement with the federal Department of Health and Human Services so provides and if the legislator or constitutional officer files with the state agency a written request for the transfer.