California Code of Regulations (Cal. Code Regs.): Title 24 – California Building Standards Code > Cal. Code Regs. §3120B.2 Pool User Capacity Sign
A sign shall indicate the maximum number of pool users permitted for each pool.
§3120B.2.1 Spa pool.
The pool user capacity of a spa pool shall be based on one pool user for every 10 square feet (0.929 m2) of pool water surface area.
§3120B.2.2 Other pools.
The pool user capacity for all other pools shall be based on one pool user for every 20 square feet (1.858 m2) of pool water surface area.
Exception: Pool user capacity requirements do not apply to wading pools or spray grounds.