In no event shall any experience rate result in a state agency making contributions of more than three percent (3%) of its gross payroll expenditures. In the event that an agency builds a deficit which would require a contribution rate greater than three percent (3%), then that agency shall continue to make contributions at the rate of three percent (3%), even though eligible for an experience rate reduction, until any deficit owed the fund is repaid. Only then shall the actual experience rate be used to compute such agency contributions.