2005, 2006, 2007 Golf (2) – 2019, 2020 Hockey (7) – 1982, 1987, 1988, 1989, 1991, 1992, 1993 Rowing (13) – 2002, 2003, 2004, 2007, 2008, 2010, 2011, 2012, 2015, 2016, 2017, 2019, 2021 Rugby (9) – 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 2002 Soccer (14) – 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1995, 2000, 2001, 2007, 2008, 2012, 2015 Swimming – 2007 Tennis (4) – 1974, 1984, 1988, 1989 Volleyball (6) – 2009, 2010, 2013, 2014, 2015, 2016 Water Polo – 2013 School houses Trinity inherited a four house system from CBC Perth. Each house has a major and a minor colour, a motto and an emblem. Each classroom stream is divided into one of the four houses. Siblings and cousins belong to the house of their eldest relative. When played, competitions are held to decide the House Champion. Currently, the house system is the format for carnival competitions held within the junior school. In 1979 the senior school replaced the four house system with a three carnival competition, House of Cards, held by students in the same year. Two carnivals, swimming and athletics, are called the Bowers, and the third carnival, cross-country, is called the Sevens. Teams are the same as the home-room class. In the lead up to the swimming and athletics carnivals, each home-room class holds an impromptu meeting to decide the Jack (class captain) and the Dealer (class selector). The tactics of the Dealer are the key to winning a Bowers carnival. Each student must compete in one of the race divisions for each event and the line-ups must be submitted before a Bowers carnival begins. Each race division awards the same points descending from first to last. Calculations using intelligence gathering and misinformation are required to work out the best order to race classmates. One important play is the Jack who is awarded maximum points regardless of where he finishes in a race. Cheating is a permitted tactic. A cheat stands and points awarded if no appeal is made to the carnival judge before the end of a race. If an appeal for cheating is upheld, the cheater forfeits points earned from the race. The winning team is the class which out-trumps the other classes by setting up the most favourable mis-matches in order to score the most points. The cross-country carnival, called the Sevens, is pure in format. No cheats