Don't require different things based upon eligibility, that's a FERPA violation.
My school does this:
100 points needed to letter.
25 for membership in marching band. If you're a senior, you'll earn your jacket your senior year by the end of the fall semester if you do nothing else.
10 for trying out for All-Region.
15 for making Region.
25 for qualifying for Area.
50 for qualifying for All-State. (Yes, a State qualifier automatically letters just by doing the process, and yes, I know this is technically Spring, but Jazz and Orchestra tapers can qualify in the fall, so I'm putting it here)
20 points for making a first division at UIL Marching Contest.
15 for membership in spring semester concert band.
10 for doing a solo or an ensemble. (Yes, you can get 20 for both)
15 for making a 1 on a Class 1.
10 for making a 1 on a Class 2.
5 for making a 1 on a Class 3.
35 for performing at TSSEC, with an extra 15 if they make a 1. This also can "letter" you your freshman year.
10 points for making a first division at UIL in Concert or Sight Reading. (Can be 20).
20 points for being a Band Officer, elected or appointed.
30 points for being Drum Major.
100 points for being accepted into any collegiate school of music.
You get points for group success (to a point) and more points for individual success. Simple.
UNEXCUSED Absence Penalties:
Tardy to Practice: -1 Points.
Missed Practice: -10 Points.
Missed Performance: Points reset to zero.
Don't put anything in about grades. Let that sort itself out without you being involved.