AZ SB1539

Amends Arizona transaction privilege tax (TPT) law to expand the exemption for clean rooms used in manufacturing and processing to include clean room equipment and products made in those facilities.

Expands the clean room exemption to cover biotechnology products, life sciences products, and medical devices in addition to the existing semiconductor product exemption.

Defines "clean room and clean room equipment" to include integrated systems, fixtures, piping, movable partitions, lighting, and production machinery operating in the clean room environment, but excludes permanent building components.

Provides specific definitions for biotechnology products (pharmaceuticals, genetic therapies, diagnostics, biologics), life sciences products (lab tools and diagnostic equipment), and medical devices (instruments and implants for diagnosing and treating conditions).

Applies to taxable periods beginning on or after the first day of the month following the general effective date of the act.