The Commissioner of Mental Health and Addiction Services shall require that each applicant for an employment or volunteer position in the department submit to a state criminal background check, a check of the Department of Children and Families child abuse and neglect registry established pursuant to section 17a-101k and a check of the Department of Developmental Services abuse or neglect registry established pursuant to section 17a-247b. In addition, the commissioner may require that any applicant for an employment or volunteer position in the department, who has resided outside this state submit to a national criminal background check. No applicant shall be hired or placed in a volunteer position by the department until the results of such checks are available.