Mens Leagues
| League | Scrum Laws | Replacements |
|---|---|---|
| Premiership | Full | Not more than 7 but not fewer than 4 |
| National 1 | Full | Not more than 5 but not fewer than 4 |
| National 2, 3 & 4 | Full | Not more than 4 but not fewer than 2 |
| Caledonia Regional Leagues | Full | Not more than 7 |
| East Regional Leagues | Full | Not more than 7 |
| West Regional Leagues | Full | Not more than 7 |
| Inter City 2XV League | Full | Not more than 7 |
| East & West Reserve 1 | Full | Not more than 7 |
| East & West Reserve 2 | U19 Variations | Not more than 7 |
| Scottish & National League Cup | Full | Not more than 7 |
| Shield | Full | Not more than 7 |
| Bowl | [1] | Not more than 7 |
[1] Full scrums in any Bowl match between two clubs playing full scrums in league. U19 scrum Laws in all other matches.
Womens Leagues
| League | Scrum Laws | Replacements |
|---|---|---|
| Premier | Full | |
| Regional 1 | Full | Not more than 7 |
| Regional Leagues 2-3 & NDL | U19 Variation | Not more than 7 |
| Cup | [2] | Not more than 7 |
[2] U19 scrum Laws except in any match between clubs playing in Premier or Regional 1.