IISI Syllabus: LLP Registration Rules

The IISI syllabus is stricter than I expected. I am currently buried in the investment regulations module and I am getting stuck on the partnership rules. Can someone confirm if a limited liability partnership is required to be registered if the firm members manage money for public clients? Looking at the textbook examples, they say a registered partnership is fine, but I saw conflicting information in the supplementary notes regarding the clean skin rule application.