1999 to 2005: Original conception of National Division One which had relegation and promotion to the Premier Division.
2005: League folded to due financial constraints
2014: National Division One reinstated
2015: Fort William and Oban Camanachd promoted to an expanded Premiership, while Bute voluntary dropped to South Division One. Inverness, who had finished bottom of North Division One in 2014 promoted in lieu with all other teams choosing to stay put for financial reasons. On the eve of the season opener, Glenorchy pulled out of the league leaving only 7 teams.