Requires installation of operational automatic rain sensor on lawn sprinklers as condition of sale and on lawn sprinklers on commercial, retail, or industrial property and in common interest communities within specified timeframes.

This bill requires all existing lawn sprinkler systems (installed before September 8, 2000) on residential properties sold after the law takes effect to include an operational rain sensor that automatically stops irrigation during rainfall. It mandates retrofitting within 12 months for commercial/industrial properties and within 24 months for common-interest communities (like HOAs or condos). Property sales cannot close without documentation proving sensor installation, and sellers/owners face up to $500 fines for non-compliance. The law applies to all residential sales but excludes common-interest communities from the sale documentation requirement.