Complex sentence: The casino and restaurant area were not protected by a fire sprinkler system with the excuse that the area was occupied 24 hours a day and a fire would be quickly noticed and contained with portable fire extinguishers.
Split into simpler sentences: The casino and restaurant area were not protected by a fire sprinkler system. The rule was based on the reasoning that a fire would be quickly noticed by occupants and contained with portable fire extinguishers.