If it is like AFROTC it is a graduated scale. 36 across the boards will get you max points. 36 Composite, where you have a 36 in M, 36 S, 35 R, and 35 E, would get you close to the max, but not the max, because you had 2 35s.
I do not know if that is just ACT or Par included, others will let you know.
For AROTC remember it is not only the score, but your school choices. I.E. Notre Dame is a powerhouse for all ROTC branches. ACT is just a portion of the PAR. Your class rank, your class rigor, and cgpa will also be factors.
ACTs are superscored for AROTC, thus theoretically if you take them enough you can max those points out, but you still have to deal with class rank, rigor and cgpa which can't be superscored. Due to that fact, your PAR would be lower than someone else that is top 1% of their class, every AP available, and a 4.37 wcgpa out of a 4.5 scale.
It is called the Whole Candidate Score for a reason. Each portion of the WCS matters. Strong academically with no ECs will hurt you because they don't want just the book smart kid. They want the kid that can maintain a high caliber academic life while also managing time to be the Capt of a team, President of NHS, and has worked for 3 yrs 20 hrs a week.