I looked into this a while back and IIRC, the consolidated legislation doesn’t cover all legislation but only a handful.

Also, in my experience (having built in this space before), regulations aren’t really the issue. Court rulings are, because there’s no open data for them in Spain. And the potential users for a paid product (legal professionals) already know the law; the key players (big law firms) have their own databases of annotated and verified court rulings and other documents.