AZ SB1599

Expands the definition of property subject to assured water supply requirements from "subdivided lands" to "one or more lots, parcels or fractional interests in land" without regard to lease duration.

Requires cities, towns, or counties to approve building permits for residential, commercial, and industrial development on properties without plats only if the property has a certificate of assured water supply or written commitment of water service from a designated provider.

Changes "subdivider" language to "person" throughout the statute to broaden applicability to various property developers and sellers.

Modifies notification requirements to occur "after" rather than "of" designation or modification, and adds reporting obligations to conservation districts regarding projected replenishment obligations.

Removes the January 1, 2008 deadline for adopting rules on gray water reuse system requirements for reducing water demand in assured water supply applications.