As long as the activities meet the organizational purpose of the 501(c)(3), sure. For example, if the 501(c)(3) of the Oakmont High School Band has the organizational purpose, "to advance music education and appreciation in the Tri-State Area" The this charity could be the vehicle for donations and spending of the St. Agatha High School Band, while they get their charity up and running (tends to take upwards of 6 months or 5 years if Obama doesn't like your politics). But if the Oakmont organizational purpose is "to advance music education and appreciation among the students at Oakmont", then that would be a no.
Answered on Apr 30th, 2014 at 4:25 PM