In England and Wales parliament can by statue convey legislative power to independent regulatory agencies.
Some key English regulators are:
Scrutiny of regulation
Note: Within the European Union legal system you will encounter citations to regulations, delegated regulations and implementing regulations.
In USA regulations are issued by federal agencies, boards, and commissions. They explain how these agencies plan to carry out laws. They are published annually.
The US materials in Westlaw US includes special collection called Regulations which includes Code of Federal Regulations (CFR), State collection, State Surveys and Regulation Tracking.
Sites on the free web
The Federal Register is the official daily publication for (inter alia) "proposed, interim, and final rules and regulation
