Which requirement is NOT necessary for a physical therapist assistant according to the supervision rules?

For a physical therapist assistant (PTA) to function effectively under the supervision of a physical therapist (PT) in Arizona, the supervision rules dictate specific requirements. One such requirement is that the PTA must work under direct and appropriate supervision, but this does not mean they must be under direct supervision at all times. Rather, there is flexibility in supervision levels, shaped by the complexity of the patient's condition and the PTA's experience.

The correct answer points out that it is not necessary for a PTA to be under direct supervision at all times. Instead, a PT can delegate certain tasks to the PTA as long as proper protocols are followed, such as ensuring that the PTA is well-trained and competent for the assigned tasks. This allows for more efficient treatment modalities while still ensuring patient safety and care quality.

In contrast, the other options lay out necessary supervisory and collaborative requirements. A PT must indeed provide documentation or a statement affirming their expertise, as this establishes the required qualification for supervising a PTA. Additionally, the PT's involvement in patient care is crucial for the continuity of care and ensuring the treatment plan is effectively implemented. Finally, PTs are expected to co-sign documentation completed by a PTA, ensuring that the PT remains accountable for the treatment provided.