Any other provisions of law to the contrary notwithstanding, the board of trustees may increase the normal and accrued liability employer contribution rates of the Department of Public Safety, the Department of Natural Resources, and the Department of Revenue to an amount set by the board of trustees as actuarially sufficient to fund the employer's cost of the benefits provided in this chapter for groups of employees of such departments. In the event any group of employees of any of such departments is transferred to the administration of any other department or agency, that department or agency shall continue to pay the normal and accrued liability contributions on behalf of such employees at the rate set by the board of trustees.