The installation of containers on the roof of any structure is ____________ unless approved by the authority having jurisdiction and the fire department.

The installation of containers on the roof of any structure is prohibited unless there is specific approval from the authority having jurisdiction and the fire department. This restriction is in place due to safety concerns related to fire hazards, structural integrity, and potential accessibility issues during emergencies. Rooftop installations can pose risks not only to the structure itself but also to the safety of individuals who may be in the vicinity.

Approval from the appropriate authorities ensures that any installed containers meet local codes, safety standards, and regulations necessary to mitigate these risks. The need for careful inspection and oversight underscores the importance of maintaining safety and compliance in environments where propane—an inherently flammable substance—is used. It's important to note that while the option may include scenarios in which installation could occur, it is contingent upon receiving the necessary approvals, reinforcing the primary essentiality of safety regulations in the handling and storage of propane.