29.1. The pension reserve fund is hereby continued. It shall be the fund from which shall be paid all pensions payable pursuant to the provisions of this Article. In the case of a disability retirant who is returned to the employ of the City his pension reserve, computed as of the date of his return, shall be transferred from the pension reserve fund to the employees’ savings fund and pension accumulation fund in the same proportion that his pension reserve, as of the date of his retirement, was transferred from the employees’ savings fund and pension accumulation fund to the pension reserve fund. The amount transferred to the employees’ savings fund shall be credited to his individual account therein.