Rugby's membership numbers are obtained from a national rugby membership database managed by the New Zealand Rugby Union.
Each rugby season, all players, coaches, referees and other volunteers are required to complete a New Zealand Rugby Union Rugby Registration Form.
Their information is entered into the national database by either their club, school or Provincial Rugby Union.
The database is used by clubs, schools and Provincial Rugby Unions for rugby administration purposes. The New Zealand Rugby Union and Provincial Rugby Unions also use the database to analyse membership numbers for developing initiatives to further support club and school rugby in New Zealand.