There is nothing on the rubric that says it should or shouldn't be used. Personally I very much respected all of the directors I saw who did it. I used it still for our performances, and since we were able to do it at home we were distanced still too.
I acknowledged the use of it in the 'other comments' on the bottom that do not affect the rating.
I did go without them for our marching contest performance, but I was more concerned with visuals and kids getting horns up in time. They only did that for region, area, and one run at a mock contest at home. I'm a big proponent of following the research even if everyone else around me may not. If I can make it to the end of the year without having a spread identified to my rehearsals I will feel like I've done my job. I know plenty of people have gone to their normal concert arcs with no masks - that's their own decision to make.
I will say some of the better bands I got to see perform this year were the ones who were using PPE.