A. The dependent contributions, which shall be required in the same manner as normal contributions of each member throughout his membership in addition to the normal contributions, shall be such as would be necessary to provide upon the date of his service retirement at fifty-five years of age or upon the completion of twenty years service at an age higher than fifty-five years, when accumulated with interest and applied by actuarial rates and tables and approved by the retirement board, for the continuance after his death and throughout the life of a widow, whose age at such date is the same age of the member, of two-thirds of the annuity provided by his accumulated normal contributions upon the retirement at fifty-five years of age or at higher ages.

B. If at the date of retirement for service or retirement for disability, the member has no wife who qualifies for the continuance of an allowance to her after the death of the member, the dependent contributions, with accumulated interest thereon, shall be paid to him upon that date, or at his option, applied in the same manner as his normal contributions to provide for him an annuity which shall be added to the annuity provided by the normal contributions. (Prior code § 5.38.110(d))