The best foundational tool.

What Annotated is

Annotated brings each regulation into the context that makes it useful. The current statute text together with its drafting history and forthcoming amendments. The official guidance, the national implementing law of European rules, the supervisory-authority decisions, and the court judgments that interpret it. Pin-cited to paragraph and point.

This is the work practitioners do anyway — assembled once, kept current, so you read the law instead of reassembling the sources every time.