Final answer:
This situation violates the third right of delegation: Right direction and communication.
Step-by-step explanation:
The situation described violates the third right of delegation: Right direction and communication. This right ensures that clear instructions and expectations are communicated to the UAP. In this case, the nurse did not communicate to the UAP that the client was on bed rest and should not be weighed. If the nurse had provided proper direction and communication, the UAP would have been aware and would not have allowed the client to get out of bed.