For the purposes of WAC 296-127-400 through 296-127-470:

(1) "Developmental disability" means a disability attributable to mental retardation, cerebral palsy, epilepsy, autism, or another neurological or other condition of an individual found by the secretary of social and health services to be closely related to mental retardation or to require treatment similar to that required for individuals with mental retardation, which disability originates before the individual attains age eighteen, which has continued or can be expected to continue indefinitely, and which constitutes a substantial handicap to the individual.

(2) "Worker with a disability" means an individual whose earning capacity for the work to be performed is impaired by physical or mental disability or injury.

(3) "Prevailing rate" means the prevailing rate of wage as defined in RCW 39.12.010 and as determined by the industrial statistician.