1. an enrollment means simply putting a name on a roll. (HCO PL 19 Feb 68)2. someone who has signed up for a service paying the full fee and who has started the service signed up for. (A sign-up is just a sign-up until he starts the service at which point he is an enrollment.) (HCO PL 26 Nov 7111)[The above HCO PL was revised and reissued as HCO PL 26 Nov 71R II, Division 6 PublicReg Simplified, which was cancelled by BPL 1 Dec 72 IV]