A. Except as set forth in Subsection B of this section, the period of service used to determine whether a member is eligible for pension benefits under the provisions of this part shall be computed from the date on which a person becomes a member of the Police Pension Fund. If, after becoming a member, a person leaves the service of the City and is subsequently re-employed, for purposes of determining eligibility for benefits, his time of service shall be computed from the date on which he last became a member of the fund.
B. A member who terminates his service in the police force of the City and has been re- employed as a member of the police force shall be entitled to credit for prior service in determining his eligibility for pension benefits under the following circumstances:
(1) Such member shall be entitled to a credit for prior service if he has repaid to the fund any contributions which he withdrew from the fund upon leaving the service of the City. The extent of prior service for which such member shall be entitled to a credit shall be based on the length of time during which such member originally paid the contributions which he withdrew and which he repaid.