Except as provided in §B or C of this regulation, to determine the applicable option factor or annuity value , the Retirement Agency shall use the age of a member, former member, or designated beneficiary as of the effective date of retirement. If the effective date of retirement is 6 months or more after the previous birth date of the member, former member, or designated beneficiary, the Retirement Agency shall increase the age of the member, former member, or designated beneficiary to the next full year. For the recalculation of an allowance payable under State Personnel and Pensions Article, §21-403(b), (c), (e), or (f), Annotated Code of Maryland (Options 2, 3, 5, or 6), to determine the applicable option factor, the Retirement Agency shall use: The option factors and annuity values described under Regulation .02, .03, or .04 of this chapter which are applicable to the retiree as of the effective date of retirement; and Subject to §B of this regulation, the ages of the retiree and designated beneficiary at the time of the change of beneficiary.