You make All-Region Band or get a 1st Division on a Class 1 Solo/Ensemble or participate for 4 years (Seniors will get them at the end of Marching season).
Really easy to determine, no points necessary. My kids would practice their butts off to get the jacket as soon as possible. Most made it to State in an ensemble by Sophomore year, we put alot of emphasis on that.
Our Varsity athletes earned their jacket if they play 1 quarter of 1 Varsity game...