time he or she elects to become a safety member his or her election to pay into the retirement fund an amount equal to the difference between the contributions actually made during the time for which he or she claims credit and the contributions he or she would have made during that time, including all additional contributions, if any, required by Article 7.5 of this chapter, had he or she been a safety member, together with regular interest on the amount required to be deposited.

to fund an amount equal to the difference between the member and employer contributions actually made as a general member and the member and employer contributions made for the time in which he or she claims credit, together with regular interest on the amount required to be deposited. The member may elect to fund the contributions by either a lump sum payment or by installment payments. No other restrictions shall be placed on a member’s election to receive additional credit as authorized by this subdivision.