The department shall establish procedures whereby complaints of the client or complaints of the staff concerning admission, treatment, or habilitation can be speedily heard. Clients shall receive reasonable notice of such procedures. Final decisions shall be made by the superintendent or advisory committee, whichever is appropriate, with the right of appeal to the director of the Division of Mental Health, Mental Retardation, and Substance Abuse or his designee. The board shall establish rules and regulations for the implementation of such procedures. However, the client shall not be required to utilize these procedures in lieu of other available legal remedies.