Joy,
I was told lots of conflicting rules early on. I was specifically told that one early on then later on the same person told me a different rule. In both cases the rule I was told encouraged me to enter either in the "30 lessons" rule because the competition would be limited to 30 lessons and in the later case because I still quaified! I know both couldn't be true! (Honestly, I think many people don't now the true rule.)
If it's an NDCA comp, I think best resource is the
NDCA rulebook which states:
c) PROAM competitions may offer any orall of the following divisions: NEWCOMERS, BEGINNER, INTERMEDIATE; ADVANCED; THEATRICAL; EXHIBITION; Level sin Pre-Bronze, Bronze, Silver, Gold, GoldStar, Supreme Gold; separate or merged categories by age or gender, etc.
(1) Pro/AmStudent,Student Student and
Mixed Amateur Dancers are eligible to enter the Newcomer division for a period of one year commencing with their first NDCA sanctioned event regardless of the style.
(2) Newcomer Division shall be restricted to Closed Syllabus only.
It's worth noting that it is almost impossible to police the number of lessons someone has taken.
Novice is the comparable NDCA "AM/AM" category and has it's own rules. Even some comp organizers sometimes swap the terms Novice and Newcomer. (I have trouble remembering which is which until I check.)
I don't know rules for other organizations.