Yes, there are regulations that are Australian standards but please also check with your local state for there regulations.
Australian Standard Regulations AS 1926.1- 2012 stipulates that a fence must have a Non-Climbable Zone (NCZ) of 900mm on the outside of the pool fence all the way around. Note: Trim trees or shrubs near the pool fence and other objects such as BBQ, pot plants, toys, ladders, and chairs should not encroach within the NCZ area.
Minimum height for shade sails posts 2200mm Maximum height for shade sail posts 3200mm