Arizona signed House Bill 2603 to add a definition in Section 10-140, Definition – Arizona Revised Statutes (Section 10, Corporations and Associations)
In particular, now 10-140(53) reads:
53. “WRITING” OR “WRITTEN” INCLUDES BLOCKCHAIN TECHNOLOGY AS DEFINED IN SECTION 44‑7061.
See https://legiscan.com/AZ/text/HB2603/id/1718691
The definition of “blockchain technology” is contained in Section 44-7061: …