Proposition 45, on California's November 2026 ballot, was presented as an essential measure to accelerate the construction of critical infrastructure — housing, schools, roads, and clean energy plants. What doesn't appear in its campaign materials is that its technical language, designed to streamline environmental review of major projects, could have an unexpected side effect: allowing data center developers to bypass the environmental and local barriers that California has erected over the past year.
The measure creates a 365-business-day deadline for government agencies to complete the Environmental Impact Report (EIR) for eligible projects and mandates that any legal challenges must be resolved within 270 days. Supporters' logic is straightforward: slow bureaucracy kills essential projects, and mandatory deadlines force efficiency. But for communities that have fought for months to keep data centers out of their districts, what's at stake is far more practical than legal theory.
California approved a package of seven laws in September 2026 specifically to regulate data centers — requiring additional environmental impact assessments, new tariff surcharges to cover transmission and distribution costs on the grid, and transparency rules on water use. All take effect January 1, 2027. Meanwhile, municipalities have already passed 26 local moratoria and outright bans on new installations. The combination of state legislation and local restrictions represents one of the most comprehensive attempts in the country to rein in the industry's rapid growth.
That's where Proposition 45 becomes a potential fault line. The measure doesn't mention data centers by name — and the Data Center Coalition, an industry group supporting the measure, has stated that data centers are "not eligible" under any of its provisions. But the law doesn't need to explicitly name a sector for it to benefit indirectly.
The crux of the issue lies in how the measure structures its streamlining system. It categorizes eight types of project as "essential" and eligible for expedited review, including high-density housing, educational facilities, transportation, water, clean energy, and — crucially — "broadband internet facilities." There's also a clause extending the same streamlined treatment to "any other infrastructure required to bring them into operation."
According to Julia Stein, deputy director of the UCLA School of Law's Emmett Institute on Climate Change and the Environment, this ancillary clause is the mechanism through which a data center could slip in. "What Prop. 45 does is designate an entire class of projects that would be subject to streamlining, and then it also says that projects ancillary to those projects — so something you might need in the course of developing the project itself that's exempted — would fall within the same streamlining bubble," she told CalMatters. "Telecommunications projects are explicitly streamlined under the proposition, and there's an argument that the development of data centers might be necessary for projects like that."
The question isn't entirely novel. The Sacramento Bee investigated the same concern in August 2026, when legal scholar Chris Micheli published an opinion memo arguing that the measure wouldn't apply to data centers because none of the eight listed project categories correspond to that definition. But opponents raise an equally solid counterargument: the fact that the law doesn't explicitly prohibit data centers from the ancillary telecommunications category means judges could decide case by case. Projects like high-speed rail, for example, were explicitly excluded from streamlining — suggesting that the omission of data centers was deliberate, not accidental.
Furthermore, the measure includes a supremacy clause stating its provisions prevail over "any other related laws." Opponents argue this could override measures like SB 887, which requires specific environmental impact review for data centers, or local municipal moratoria. If a court interprets the supremacy clause broadly enough, the package of seven laws that state legislators approved in September could be effectively disarmed before it even takes effect in January 2027.
What makes this situation particularly ironic is that the very promoters of Proposition 45 are heavily funding its campaign. Technology and utility companies — direct beneficiaries of California's AI computing boom — are investing millions to ensure the measure passes, while the Data Center Coalition simultaneously insists the legislation doesn't affect them. It's a rare case of dual lobbying: the tech finance sector wants the measure to pass to accelerate real estate and energy projects, while the data center sector tries to maintain that the measure doesn't apply to them.
The ultimate outcome will be decided in courtrooms, not at the ballot box. California has relied on the CEQA as an environmental protection tool for more than 50 years, and the law's judicial history shows that broad interpretations of "essential infrastructure" have been successfully challenged by environmental groups before. But time works in developers' favor — each month of legal uncertainty delays judicial decisions and allows projects to advance under provisional rules.
The question is whether the state's data center environmental laws represent the final word on sector regulation, or the first chapter of a legal battle spanning years — and whether California can maintain its position as the state with the country's strictest rules against uncontrolled data center expansion, or end up serving as a cautionary tale about how well-intentioned legislation can be undermined by a technical clause in an unrelated measure.
Sources: The Verge, CalMatters, Los Angeles Times
✓ Independent sources cross-checked and verified before publishing
