revise the scope of practice for occupational therapy.

HB 1223 revises South Dakota's occupational therapy regulations by clarifying the scope of practice for therapists. The bill specifically limits the use of physical agent modalities (like heat, cold, or electrical treatments) to the upper extremities and requires therapists to be certified for these techniques. It updates definitions in the law to ensure occupational therapists, assistants, and aides operate within clearly defined boundaries, directly affecting licensed occupational therapy professionals in the state. This is a technical clarification, not a policy expansion.