The Wellington Improvisation Troupe, aka WIT, is a member-based community group established in 2003 (official certificate of incorporation!) to bring improv and happiness to Wellington. [History of those beginning times . . .]
We’re a registered charity, with a constitution, and a formal process for electing a committee from among our members.
Our official entry on the Charities Commission website (search on Wellington Improvisation, or for registration number CC52293) is a little out of date in terms of committee members, but includes some important documents, such as the rules under which WIT was established and still operates.
WIT also has a Wikipedia Entry.