The occupational therapist is responsible for all duties delegated to the occupational therapy assistant or tasks assigned to direct service personnel. The occupational therapist may delegate to an occupational therapy assistant those portions of a client’s evaluation, reevaluation, and intervention that, according to prevailing national practice standards, can be performed by an occupational therapy assistant. The occupational therapist may not delegate portions of an evaluation or reevaluation of a person whose condition is changing rapidly.