As used in this chapter, the term:

(1) "Day-care center" means any facility that is operated and maintained for and is qualified to furnish care and training to mentally retarded individuals on less than a 24 hour basis.

(2) "Mentally retarded individual" means any individual who is suffering from mental retardation.

(3) "Mental retardation" means a state of subaverage general intellectual functioning which originates during the developmental period and is associated with impairment in adaptive behavior.