That’s not accurate. AP courses cannot be offered as part of the MS curriculum, with the exception of world language courses, as noted. However, in accordance with school/district policy, an 8th grader can take an AP class at the HS. The CB has no jurisdiction on how a school/district allows registration to a HS course.
Admittedly, this will only impact very very few students, and the OP has given no indication that s/he is among this group.