The phrase "law regulate" is correct and usable in written English
For example, you could say something like: "The laws regulating gun ownership have become more complex in recent years."
What else might the law regulate?
It's time to ditch this anachronistic, paternalistic law, regulate abortion like all other healthcare procedures, and trust women with their own bodies.
So last May, when the National Oceanic and Atmospheric Administration (NOAA) said it was concerned about the state bans, we were all quite puzzled and submitted a letter essentially asking, "What gives?" Don't state fin bans and federal law regulate completely different things?
Under the state law regulating private investigation and security companies, such background checks are required.
The case prompted the Legislature to pass a law regulating such products.
"We need a law regulating how domestic work should be remunerated.
A new law regulates the placement and maintenance of news racks on city sidewalks.
The law regulates the removal of lead-paint hazards, including dust, from apartments built before 1960.
In 1999, the City Council passed a new law regulating lead paint removal in apartments.
In 1995, the court struck down a federal law regulating guns near schools.
Last year Congress revised the Magnuson-Stevens Act, the basic law regulating fishing in national waters, to give it sharper teeth.
