They are using junior rules for 50/70 LL except for the size of the field. This includes allowing metal spikes. They are SUPPOSED to use BBCOR bats but all the local leagues agreed to allow any LL approved bat.
Most 7th graders are 12-13 and most 8th graders are 13-14 and owuld be playing juniors in LL. Therefore BBCOR would be required there as well.