Final answer:
Rooftop gardens and landscaping must be maintained in a healthy condition and cannot encroach upon required clear areas. If the area exceeds a certain limit, a rooftop garden hose connected to an approved water supply is provided.
Step-by-step explanation:
In the context of rooftop gardens and landscaping, if the area exceeds a certain limit, a rooftop garden hose connected to an approved water supply is provided. The specific size limit is not mentioned in the information provided. However, it is stated that rooftop gardens and landscaping must be maintained in a healthy condition and cannot encroach upon required clear areas.