| Abbreviation | Definition |
|---|---|
| BLRC | Burnaby Lake Rugby Club |
| BRC | Brothers Rugby Club |
| BRRS | Border Rugby Referee Society |
| BRRS | Border Rugby Referees Society |
| CCRC | Colonial Coast Rugby Conference |
| CHRU | Central Highlands Rugby Union |
| COBRA | Combined Old Boys Rugby Association |
| CRC | Collegiate Rugby Championship |
| CRFU | Canterbury Rugby Football Union |
| CURM | Club Universitario Rugby Murcia |
| DARC | Dallas Athletic Rugby Club |
| DARC | Dayton Area Rugby Club |
| DPAR | Deutsche Polizei Auswahl Rugby |
| DRLC | Dutch Rugby League Competition |
| DRV | Deutscher Rugby Verband |
| EBRA | European Beach Rugby Association |
| ECRU | Eastern Counties Rugby Union |
| EGOR | European Golden Oldies Rugby |
| EIRA | Eagle Impact Rugby Academy |
| EMRU | East Midlands Rugby Union |