Ohio Rev. Code Ann. § 5505.55

A member's participation in the deferred retirement option plan ceases on the occurrence of the earliest of the following:

(A) Termination of the member's active service in the state highway patrol;

(B) The last day of the eight-year period that begins on the effective date of the member's election to participate in the plan;

(C) The member's sixtieth birthday;

(D) Acceptance by the member of a disability benefit awarded by the state highway patrol retirement board under section 5505.18 of the Revised Code;

(E) The member's death.