But, at the last minute, the Information Commissioner's Office (ICO), which is tasked with enforcing the changes, announced that firms have a year to sort their sites out before it will take any action.
Information Commissioner Christopher Graham said on Wednesday that the organisation would take this approach, but that it is not an example that companies should blindly follow, explaining that the ICO will use examples from other sites to shape its guidance.
"Every web site is different, and prescriptive and universal 'to do' lists would only hinder rather than help businesses to find a solution that works best for them and their customers," he said.
"The initial advice that we issued earlier this month will continue to be supplemented with real-life examples as they come in."
ICO home page asking users' permission to store cookies on their computers.
IBM and Technical University of Munich team demonstrate how Shor's algorithm, which can't be cracked by conventional computers, can be solved quickly with quantum computing
Hubble Space Telescope finds superflares from young red dwarfs could strip away planetary atmosphere
Younger stars are 100 to 1,000 times more energetic than when they're older
Two of the big four supermarkets will use the system to control sales of restricted products
PUBG news and updates: November's Update #23 to bring new Skorpion pistol and changes to blue zone visibility
Genuinely useful side-arm coming to PUBG in Update #23