over at PinoyCosplay.com asks
about specific requirements for group cosplay.
The only mention of group cosplay I can find is in the timing rules
6. Time Limit.
All entrants must adhere to the time limit for their appearance on stage. Thirty seconds will be given to single cosplayers while group cosplayers will be given one to two minutes, depending on the number of cosplayers in a group. Cosplayers will be called out according to the order during registration, therefore group cosplayers are advised to register at the same time.
Anyone care to elaborate on group cosplay requirements?