Amateur radio is governed by the rules and regulations in Title 47, Chapter I, Subchapter D, Part 97. Hams usually call these the “Part 97” rules. This page has links to look up any details that you might have questions about.
Code of Federal Regulations
The Electronic Code of Federal Regulations lists the most current and up-to-date Part 97 rules. Click here for a link to those rules.
ARRL Regulations Page
The American Radio Relay League has a page dedicated to the current Part 97 rules. Click here for a link to that page.