California Code, Health and Safety Code - HSC § 1798.8

(1) Limit, supplant, prohibit, or otherwise alter a public safety agency's authority to directly receive and process requests for assistance originating within the public safety agency's territorial jurisdiction through the emergency “911” system established pursuant to Article 6 (commencing with Section 53100) of Chapter 1 of Part 1 of Division 2 of Title 5 of the Government Code. This paragraph does not supersede the local EMS agency's authority to adopt and implement emergency lifesaving instructions or EMD prearrival instructions.

(2) Authorize or permit a local EMS agency to delegate, assign, or enter into a contract in contravention of subdivision (b) of Section 53110 of the Government Code.

(3) Authorize or permit a local EMS agency to unilaterally reduce a public safety agency's response mode below that of the EMS transport provider, prevent a public safety response, or alter the deployment of public safety emergency response resources within the public safety agency's territorial jurisdiction.

(4) Authorize or permit a local EMS agency to prevent a public safety agency from providing mutual aid pursuant to the California Emergency Services Act (Chapter 7 (commencing with Section 8550) of Division 1 of Title 2 of the Government Code).