The legislation is in response to the Republican-led FCC's move in December to repeal numerous existing net neutrality rules, which prohibited internet providers from blocking or throttling traffic, or from selling "fast lanes" so websites and other types of content can gain speedier access to consumers.
The Trump FCC's repeal of the 2015 Open Internet order - which was approved past year and took effect this summer - has sparked efforts by many US states to enact their own rules to prohibit the blocking or throttling of internet traffic.
The state Senate approved the bill over stiff opposition from internet service providers, opening another front in the war between California and President Donald Trump.
The bill seeks to turn California into the leader of a widening state-led backlash against the FCC, which did not respond to a request for comment. To opponents, the rules represented burdensome, harsh regulations on companies; for proponents, they were strong and necessary protections for consumers.
The Campbell Democrat said he authored the bill because conversion therapy has been proven ineffective and harmful. It now goes to the desk of California Governor Jerry Brown for approval, the Los Angeles Times reports.
The law would be the strictest for internet providers in the United States, and put California at odds with the federal government.
"Net neutrality is not dead. But that hiccup means that, although a version of the bill already passed in the California Senate, it's now different enough from that initial version to have to be re-voted on".
Many advocates for net neutrality find the California legislation hopeful.
"If there's one thing this victory in California shows it's that Internet users are still royally pissed off about the FCC's repeal of net neutrality".
Meanwhile, lawmakers sent dozens of other bills to Gov.
"ISPs have tried hard to gut and kill this bill, pouring money and robocalls into California", said Katharine Trendacosta, policy analyst for Electronic Frontier Foundation, in a letter to supporters after the Assembly vote. "And they're not going to let their elected officials get away with it if they sell out their constituents by siding with big telecom companies". "They're still paying attention". The rules prevented internet companies from exercising more control over what people watch and see on the internet.