Benefit Enrollment Rules

When I look at the various plan rules configuration for the eligible Employee Group, I have the following results:
BS01: No enrollment rules
BS03.1: No enrollment rules
BS03.2: No enrollment rules
BS03.3: Enrollment rules for all plans

Is there any significance in the discrepancy of results.  I would beleive the enrollemnt rules need to be configured for each area, new hire, life event, and open enrollment.  Any feedback is appreciated.