The Obama administration on Friday began the biggest overhaul of food safety rules in more than 70 years.

The Food and Drug Administration (FDA) released two major regulations aimed at preventing contamination of the food supply. The long-delayed rules implement the Food Safety Modernization Act, a 2010 law that “[shifts] the focus from responding to contamination to preventing it.”

“Preventing problems before they cause harm is not only common sense, it is the key to food safety in the 21st century,” said FDA Commissioner Margaret Hamburg.

The two rules proposed by the FDA would require food producers to develop and enact comprehensive plans to prevent contamination of their products. Those plans would be submitted to the FDA for approval and enforcement.

Food safety advocates had complained bitterly about missed deadlines for enacting the law. Many attributed the delay to election-year politics.