Final answer:
The question involves a law that mandates the installation of sprinkler systems in all office buildings of a certain height as of July 1, 2019, in accordance with the Fire/Building Code.
Step-by-step explanation:
The question pertains to a regulation that requires all office buildings of a certain height to install sprinkler systems for fire safety compliance as of July 1, 2019. Such mandates are typically included in the Fire/Building Code, which is designed to enhance the safety of buildings in the event of a fire. It is important for all office buildings meeting this height criterion to have a sprinkler system installed throughout the entire building. Additionally, buildings that have previously voluntarily installed sprinkler systems must ensure that these systems comply with the latest code requirements to maintain safety and legality.