The Board is authorized to employ such clerical and technical staff assistants, not to exceed fifteen, as may be necessary to enable the Board to transact its business and, if the rate of compensation is not otherwise fixed by law, to fix their compensation. In order to avoid actual conflicts of interest, or the appearance of conflicts of interest, no employee, contractor, clerical or technical staff shall be a retired or former employee of the Illinois State Police. All employees shall be subject to the Personnel Code.