Retirement allowances paid to members eligible to retire under the provisions of RCW
41.40.180,
41.40.200,
41.40.210,
41.40.220,
41.40.230, and
41.40.250 shall accrue from the first day of the calendar month immediately following the calendar month during which the member is separated from service. Retirement allowance paid to members eligible to retire under any other provisions of *this 1972 amendatory act shall accrue from the first day of a calendar month but in no event earlier than the first day of the calendar month immediately following the calendar month during which the member is separated from service.