As numerous startups introduce drones for recreational and commercial use, and tech giants including Amazon and Google plan delivery projects based on UAVs, concerns have emerged regarding various safety, privacy and security issues. Now policy groups tied to tech firms are working to block new legislation in California that could impact the deployment and use of drones. Senate Bill 142, which passed the California Assembly on Monday, restricts operation of UAVs under 350 feet above properties without permission of the property owners.

The bill passed the Assembly by a wide margin, and will next go to the California Senate for approval. If passed, it would then head to Governor Jerry Brown.

“If signed, advocacy groups that represent many of the largest Silicon Valley firms say it would create a litigious nightmare, hamper public use cases of drones and land a blow to a burgeoning tech market,” reports Re/code.

“The Consumer Electronics Association has estimated that unmanned vehicles will generate $14 billion in economic impact in the state over the next ten years — from recreational sales windfalls to broader use cases, like delivery or emergency response services. That impact could be knocked out by the bill, the association wrote to its sponsor, State Senator Hannah-Beth Jackson.”

“Drones are a new and exciting technology with many potentially beneficial uses,” said Senator Jackson. “But they should not be able to invade the privacy of our backyards and our private property without our permission.”

“If you drive on someone’s property with a car, you’re trespassing. If you’re looking on someone’s property to break in, you’re trespassing,” said Assemblyman Mike Gatto. “It makes no sense that a drone should be able to look in your window and the operator should not be guilty of the same trespass.”

According to The Los Angeles Times, Gatto noted that the drone operator, and not the drone manufacturer, would be liable for the violation.

TechNet, a lobbying group that represents Amazon, Google and others opposes the legislation, as does action cam maker GoPro, which recently announced its own recreational drones.

California is not the only state treading on federal turf. While the FAA is expected to issue national drone regulations in September, 46 states have introduced 156 drone-related bills this year.