What must be done annually regarding restricted materials permits?

The requirement to re-apply for and inspect restricted materials permits on an annual basis is crucial for ensuring compliance with safety regulations and environmental protection standards. This process involves reviewing the materials to ensure that they are still in alignment with regulatory guidelines and assessing their potential impact on health and the environment. Regular inspections also help in identifying any changes in circumstances or regulations that may necessitate modifications to the permit's terms. By undergoing this re-application and inspection process every year, authorities can maintain oversight and ensure that the use of restricted materials is managed in a responsible manner, thereby protecting public health and the environment.

In contrast, the other options do not reflect the proper procedures related to restricted materials permits. Simply exchanging permits or updating them online does not incorporate the necessary evaluation and inspection process that the re-application entails. Posting permits at work sites, while an important practice for transparency, does not address the compliance and regulatory aspects that are critical for annual permit management.