Which of the following is true regarding FDNY permits?

The statement regarding FDNY permits that is true is that they must be posted in a location for the work being performed. This requirement is important because it ensures that the permit is visible and accessible for inspection by authorities, which helps to verify that all work being done is in compliance with safety regulations and codes set forth by the FDNY. Having the permit posted also serves as a means of communication to any personnel on-site and emergency responders about the nature of the work being conducted.

Other options do not align accurately with FDNY regulations. For instance, permits are indeed required for various types of construction and certain types of work, not just any work in general, as indicated in one of the incorrect choices. Similarly, the idea that permits only need to be available during non-business hours fails to recognize that they must be presented prominently on-site at all times while work is being conducted. This visibility requirement is critical for ensuring safety and adherence to regulations.