A. Any member who is eligible for a normal pension pursuant to section 38-844, subsection A, who becomes a member of the system before January 1, 2012 and who has at least twenty years of credited service is eligible to participate for not more than sixty consecutive months in the deferred retirement option plan. In addition, any member who is subject to section 38-858, subsection C is eligible to participate for not more than sixty consecutive months in the deferred retirement option plan retroactive to the member’s twentieth year of credited service or on the day before the member began military service, whichever is later, if the member makes the election pursuant to this section on or before resuming employment with the member’s employer. Any member who is eligible for a normal pension pursuant to section 38-844, subsection A, who becomes a member of the system before January 1, 2012, who is at least fifty-one years of age and who has at least twenty-four and one-half years of credited service is eligible to participate for not more than eighty-four consecutive months in the deferred retirement option plan.

B. A member who elects to participate in the deferred retirement option plan shall voluntarily and irrevocably:

1. Designate a period of participation that is not more than sixty consecutive months or eighty-four consecutive months, as applicable pursuant to subsection A of this section.

2. Beginning on the date the member elects to participate in the deferred retirement option plan, cease to accrue benefits under any other provision of this article. The member’s effective date of participation is the first day of the month following the date the member elects to participate.

3. Have deferred retirement option plan benefits credited to a deferred retirement option plan participation account pursuant to Section 38-844.05.

4. Receive benefits from the system on termination of employment at the same time and in the same manner as otherwise prescribed in this article.

5. Agree to terminate employment on completion of the deferred retirement option plan participation period designated by the member on the appropriate deferred retirement option plan participation form.

C. If a member fails to terminate employment on completion of the designated deferred retirement option plan participation period:

1. The member is not entitled to the interest accumulation on the deferred retirement option plan participation account.

2. The deferred retirement option plan participation account shall not be credited with the monthly amount prescribed in Section 38-844.05, subsection C, paragraph 1 and that amount shall not be paid directly to the member.

3. The payment prescribed in Section 38-844.08, subsection A, paragraph 1 shall not be paid until the member terminates employment and is payable at the same time as the pension amount is paid on retirement.

4. The member does not acquire any further credited service in the system.