Section 53121 Of Article 6. Local Emergency Telephone Systems From California Government Code >> Division 2. >> Title 5. >> Part 1. >> Chapter 1. >> Article 6.

. (a) The Office of Emergency Services shall develop a plan and timeline of target dates for the testing, implementation, and operation of a Next Generation 911 emergency communication system, including text to 911 service, throughout California.
  (b) In order to maximize efficiency and contain costs, the Next Generation 911 emergency communication system shall incorporate, where consistent with public safety and technologically feasible, shared infrastructure and elements of other public safety and emergency communications networks, including, but not limited to, all of the following:
  (1) Public safety communications identified in the annual plan required by subdivision (b) of Section 15277.
  (2) Local and regional public safety broadband networks authorized by the federal American Recovery and Reinvestment Act of 2009 (Public Law 111-5).
  (3) Public safety broadband networks authorized by the federal Middle Class Tax Relief and Job Creation Act of 2012 (Public Law 112-96).
  (4) Public safety radio and communications facilities used for the purpose of public warnings pursuant to Section 15254.