AB 1805 obligates commercial mobile wireless providers with facilities located wholly or partially inside California’s designated high fire‑threat or high earthquake threat districts to maintain specified minimum service capabilities during normal and emergency conditions. The bill defines which services must remain available (outbound 911 and 211, emergency alerts, and basic web access for emergency information) and requires written network resiliency plans subject to state review and enforcement.
This is consequential for carrier operations and procurement: AB 1805 sets engineering and operational standards—72 hours of backup energy, redundant routing, hardening against fire and seismic hazards, and rapid restoration procedures—plus specific filing deadlines and update triggers. The obligations create both compliance costs and new contractual and coordination duties with utilities, first responders, and local governments.
At a Glance
What It Does
The bill requires wireless carriers operating facilities in state-designated high fire- or earthquake-risk zones to guarantee outbound 911 and 211 access, receipt of emergency alerts, and basic internet access for emergency information. Carriers must file written network resiliency plans with the California Public Utilities Commission, maintain 72-hour backup energy at facilities, implement redundancy and hardening measures, and support rapid restoration and temporary facilities.
Who It Affects
Commercial mobile service providers (as defined in 47 U.S.C. §332(d)) with macro sites, small cells, rooftop installations, DAS, backhaul, or switching facilities inside those mapped risk zones. It also affects tower and equipment vendors, backup power and fuel suppliers, first responder agencies, utilities that provide power/backhaul, and local permitting authorities.
Why It Matters
AB 1805 moves state policy from guidance to enforceable obligations for wireless resiliency in hazard zones, creating explicit technical thresholds and submission schedules. For compliance officers and network planners, it prescribes concrete engineering deliverables, supply-chain implications, and documented coordination protocols that will alter siting, maintenance, and emergency response practices.
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What This Bill Actually Does
AB 1805 draws a clear line: if a wireless facility sits wholly or partly inside a state-mapped high fire-threat or high earthquake-threat district, the carrier that operates it must make sure certain life‑safety communications keep working through normal operations and emergencies. The bill lists four minimum capabilities carriers must preserve: outbound access to 911, outbound access to 211, receipt of Wireless Emergency Alerts (or successor systems), and enough web access for the public to reach government emergency pages.
To demonstrate how they will meet those capabilities, carriers must prepare written network resiliency plans and submit them to the California Public Utilities Commission by April 1, 2027, and then at least every three years. Plans also must be revised within 90 days after any material change to network architecture, ownership, or the carrier’s resiliency strategy.
The commission can review, audit, and enforce compliance with those plans.The statute spells out what plans must contain. At the top of the checklist is backup energy: each covered facility must be able to sustain the minimum services for 72 consecutive hours, with annual operational testing and documented fuel capacity or binding fuel-resupply contracts.
Carriers must also provide redundancy so that no single network component or backhaul path can knock out the minimum services, and they must physically harden equipment against wildfire, heat, smoke, seismic shaking, and long outages.Operationally, carriers must have defined service-restoration procedures and options for temporary facilities—mobile cell sites, portable satellite links, and temporary microwave backhaul—plus established coordination protocols with first responders, emergency managers, and utilities. Workforce preparedness rules require employee safety plans and identification of staffing levels needed for emergency operations.
Finally, the bill requires carriers to identify facilities inside seismic hazard zones and to adopt seismic anchoring, automatic protections, and post‑event inspection protocols that are integrated with the wildfire and outage response plans.
The Five Things You Need to Know
The bill makes four specific minimum service levels mandatory: outbound 911 access, outbound 211 access, receipt of Wireless Emergency Alerts (or successor systems), and basic internet browsing to reach emergency websites.
Each covered facility must have backup energy capacity and arrangements to sustain those minimum services for at least 72 consecutive hours, with annual testing and documentation of onsite fuel or enforceable resupply contracts.
Network resiliency plans must be filed with the California Public Utilities Commission by April 1, 2027, then updated at least once every three years and revised within 90 days after material network or ownership changes.
Plans must show redundant equipment and physically/geographically diverse backhaul routing to eliminate single points of failure for the minimum services.
The commission is granted review, audit, and enforcement authority over resiliency plans, making compliance subject to state oversight rather than voluntary industry practice.
Section-by-Section Breakdown
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Scope and definitions
This opening section defines the geographic triggers (high earthquake threat district and high fire threat district) using State Geologist and commission maps, and it enumerates what counts as a 'facility'—from macro cells to backhaul and support equipment. The practical effect is to make the statute facility‑level: even a small cell partially inside a mapped zone falls under the law. That drives granular inventory and mapping work for carriers and creates boundary questions where facilities straddle mapped polygons.
Minimum service levels carriers must maintain
This section lists the four services the legislature treats as essential and makes clear they must be maintained during normal and emergency conditions. Crucially, the obligation survives commercial decisions to degrade or suspend nonessential services during congestion or outages: carriers cannot meet the standard simply by declaring a commercial outage. Compliance teams will need to translate these service descriptions into measurable performance objectives and monitoring regimes.
Network resiliency plan filing schedule and commission oversight
Carriers must prepare, maintain, and implement written resiliency plans for all covered facilities, submit the initial plans by April 1, 2027, and thereafter triennially. The bill adds a 90‑day trigger to require revised filings after material changes. The commission gets explicit review, audit, and enforcement authority, which creates a regulatory compliance workflow: plan drafting, internal approval, submission, potential audit response, and corrective-action implementation.
Backup energy: 72‑hour requirement and testing
This subsection sets a hard, quantitative standard—backup energy sufficient for a minimum 72 consecutive hours—and requires annual operational testing and post‑modification testing. It also mandates documentation of either onsite fuel capacity or enforceable fuel resupply contracts. For operations teams, this drives fuel logistics contracts, generator or battery sizing studies, testing schedules, and supply‑chain risk analysis, including fuel availability under wildfire conditions.
Redundancy and physical hardening
Carriers must eliminate single points of failure with redundant equipment and provide physically and geographically diverse backhaul paths when using backhaul facilities. They must also harden sites to withstand wildfire, heat, smoke, seismic forces, and extended outages, and comply with applicable state and local building, fire, and seismic standards. This affects network design, procurement of diverse fiber or microwave routes, and capital projects to retrofit sites or change siting strategies for new deployments.
Restoration, coordination, workforce preparedness, and earthquake measures
This cluster requires documented procedures for rapid restoration and plans to deploy temporary facilities (mobile cells, satellite links, temporary microwave). Carriers must establish protocols to coordinate with emergency management, utilities, and local governments, maintain public communication procedures about outages and restoration timelines, adopt employee safety plans, identify emergency staffing levels, and implement seismic anchoring and post‑event inspection protocols. Together these provisions impose operational and interagency coordination duties that reach beyond engineering into incident management, public affairs, and human resources.
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Explore Infrastructure in Codify Search →Who Benefits and Who Bears the Cost
Every bill creates winners and losers. Here's who stands to gain and who bears the cost.
Who Benefits
- Residents and businesses inside mapped high fire- and earthquake-risk districts — they gain higher odds of reaching 911/211 and receiving emergency alerts when networks are stressed or damaged.
- First responders and emergency management agencies — more predictable communication pathways, documented coordination protocols, and clearer restoration timelines improve incident command and resource allocation.
- Hospitals and critical community facilities in risk zones — maintaining basic internet access and alert reception supports coordination of medical response and public health messaging during disasters.
- Local governments and utility operators — formalized carrier coordination reduces uncertainty during outages and helps align restoration sequencing across infrastructure operators.
- Vendors of backup power, fuel logistics, temporary cell sites, and hardening materials — the 72‑hour and hardening requirements create new procurement opportunities and demand for retrofit services.
Who Bears the Cost
- Commercial mobile service providers operating in mapped zones — they face capital expenditures for backup power, redundancy, hardening, testing, and deploying temporary assets, plus ongoing fuel and maintenance costs.
- Smaller carriers and tower operators with limited balance sheets — meeting a 72‑hour backup standard site‑by‑site may be disproportionately expensive for small-scale operators and independent tower companies.
- Utilities and fuel suppliers — they may face new operational demands to prioritize fuel deliveries and coordinate power restoration to support carrier backup systems during widespread emergencies.
- The California Public Utilities Commission — the bill assigns review, audit, and enforcement duties that will require staff time and technical resources unless matched by budgetary support.
- Local permitting and land-use authorities — an uptick in generator installations, site retrofits, and temporary facility deployments will increase permitting workload and coordination needs.
Key Issues
The Core Tension
The central dilemma is straightforward: safeguarding life‑safety communications in disaster‑prone zones requires hard engineering floors and operational coordination, but imposing uniform, facility‑level technical standards (like 72‑hour backup and physical redundancy) forces private carriers to absorb significant cost, logistical complexity, and possible technical infeasibility at constrained sites—so the policy trades broader public safety gains against burdens and practical limits on implementation.
The bill ties public‑safety outcomes to technical and logistical requirements that are concrete but operationally complex. A 72‑hour backup energy obligation looks simple on paper but raises hard questions at the site level: small cells and rooftop sites may lack physical space for batteries or generators, fuel resupply in active wildfires can be impossible, and environmental or local permitting rules may restrict onsite generators.
That means carriers will need mixed strategies—site retrofits where feasible, relocation or reconfiguration in constrained sites, and standing contracts for mobile assets—but those strategies carry uneven costs and timelines.
Enforcement and confidentiality also collide. The commission can audit and enforce plans, but the bill does not specify penalty mechanisms or how sensitive security information in resiliency plans will be protected from public disclosure.
Carriers will push to keep routing maps, redundancy plans, and hardening details confidential for security reasons, while emergency managers and the public will demand transparency about where critical services will or will not be available after an event. Finally, the statute imposes state mandates that may overlap with federal communications policy and FCC responsibilities, creating potential preemption questions or coordination gaps for interstate backhaul and roaming-dependent services.
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