Indiana requires the IHSAA patch on left sleeve for all Freshman level and higher.
You don't have to be licensed for JRHS but I suppose it doesn't hurt. I let my license lapse a couple years ago cause I wasn't working HS games but I'm going to retake the test next fall and get my patch again...
One time I heard some fan say about me, "He doesn't even have a patch on" ....I thought to myself, well...he's right but the guy I was workin with did and he was a first year guy and I'm not sure the patch made much difference!