Once the statute is "on the books" or, figuratively, "written in stone," then citing it the way it is and not the way it should be is the only way to guarantee precision in what exactly is being referenced.

In the United States, I know that the most common, and I believe the most authoritative style guide for legal work is published by Yale University. It's called The Bluebook: A Uniform System of Citation. I'm uncertain, however, how far this guide goes beyond the typographical mechanics of source citations.

Legal writing as a subject is much maligned by many legal authorities. Poor practices are repeated over and over again without thought other than a fear of non-conformity - which is pervasive within this profession.

My best guess is that "Tobacco etc." means "tobacco and tobacco products."

Being unfamiliar with British law, I really have no idea how common it is to drop the comma in instances such as these, or to what extent the legal writing style itself might conform holistically to an alternate set of practices divergent from modern publishing standards.