Yes, there must be a PLA in place for this required experience. Common Program Requirement I.B.2. states, “There must be a PLA between the program and each participating site that governs the relationship between the program and the participating site providing a required assignment.”
The purpose of a PLA is to ensure that residents/fellows are provided with an appropriate educational experience and to protect them from undue service requirements that do not enrich their education. They also ensure an understanding of common expectations, the nature of the experience, and the responsibilities of the participating site.