A whole-time or part-time pensionable officer whose accrued pension includes the annual value of a contingent right under the pension scheme to which he was last subject before suffering loss of office in respect of a widow's pension, may, if he so desires and informs the determining authority in writing within one month after attaining normal retiring age, agree to surrender so much of the annual sum payable to him as compensation under paragraph 13 of this Schedule as represents the annual value of any such contingent right in consideration of the paying authority granting to his widow an annual sum equal to one-third of his accrued pension less the part thereof surrendered under the provisions of this paragraph and less the annual value of any contingent right under the said pension scheme in respect of a death grant.

In calculating the accrued pension for the purposes of this paragraph no account shall be taken of any additional years of service or additional contributions credited under paragraph 16 of this Schedule beyond the number of years which the officer could have served before his death had he not suffered loss of office.

Any annual sum payable to a widow under this paragraph shall cease to be payable in any circumstances in which a widow's pension under the said pension scheme would have ceased to be payable.