Which of the following is a requirement for the public notification of permanent closure?

The requirement for public notification of permanent closure includes posting a sign in the window indicating the closure. This serves to inform customers and the public immediately, ensuring that anyone who approaches the pharmacy is aware that it is no longer in operation. Public visibility is crucial in maintaining transparency and minimizing any confusion for patients who may not be aware of the closure.

While other options may contribute to overall communication regarding the pharmacy's closure, the physical notice in the window directly informs anyone in the vicinity and is a widely recognized standard in notifying the public of such significant changes. It provides immediate and on-site communication, which is important in a community where patients rely on the pharmacy for their medications and healthcare needs. This step is an essential part of ensuring that patients can take appropriate action, such as finding alternative pharmacies to meet their healthcare requirements.