Let's look into some detail of the USA trail-of-safety Regulation

The US Congress, and only Congress, enacts federal laws. Federal executive departments and administrative agencies write regulations to implement the authority of laws. Regulations (as well as Executive Orders and Proclamations) are ancillary or subordinate to laws, but both laws and regulations are enforceable. The U.S. Code¹ is the official record of all federal laws, sometimes called "laws of the land", the "United States Code", "U.S. Code" or "USC".

The United States Code of Federal Regulations² (CFR) is a compilation of the general and permanent rules published in the Federal Register by the Executive departments and agencies of the Federal Government of the United States of America (The US Code). The CFR is divided into 50 "Titles", which represent broad areas subject to Federal regulation.

The CFR Titles establish supervisory authorities that, among other things, require various levels of protection of US citizens from unsafe products. Several of the main ones, which most product developers need to heed, are OSHA: public work place safety; CPSC: general consumer safety; FDA: medical product safety; FCC: radio frequency generating product safety and NCR: radiation product safety. We'll further narrow the discussion to OSHA and CPSC as these cover many of the products marketed to the general public and work places.

OSHA³ (Occupational Safety and Health Administration) is established within the Department of Labor (DOL) to regulate the safety of products and installations in all work places, as well as public and private buildings.

"...the standards contained in this part shall apply with respect to employments performed in a workplace in a State, the District of Columbia, the Commonwealth of Puerto Rico, the Virgin Islands, American Samoa, Guam, Trust Territory of the Pacific Islands, Wake Island, Outer Continental Shelf lands defined in the Outer Continental Shelf Lands Act, Johnston Island, and the Canal Zone..."