[JugglingReferee]

Here in Kitchener-Waterloo, an hour's north of Hamilton, we use 4 on all high school games, with some games using 5 to train a new official. The person who is the 5th is usually a vet who does not receive a game fee. This is one way to contribute back to the association. On some HS games, we use 6 as a training ground for 6-person mechanics (with 2 officials, and maybe a good 3rd official, learning the 6-person mechanics). On HS semis, we use 5 vets (4 paid, 1 volunteer) and 6 (all paid) for finals.