Dundee United chairman Stephen Thompson has resigned from the SPL board citing 'professional differences'.
The United chairman has announced the decision amid continued discussions concerning the reform of the Scottish game.
A club statement read: "Dundee United chairman Stephen Thompson has resigned from the SPL board with immediate effect, due to professional differences."
Following Thompson's departure, the remaining SPL board members are Ralph Topping (chairman), Neil Doncaster (chief executive) and Eric Riley, Duncan Fraser and Michael Johnston representing Celtic, Aberdeen and Kilmarnock respectively.
The news comes as SPL clubs prepare to meet on 3 December to discuss
Doncaster had earlier revealed SPL clubs had 'unanimously' agreed to explore expansion of their membership.
The SPL chief executive revealed clubs backed an idea which could see their ranks double to 24.
The plans would see two leagues of 12 split into three divisions of eight after 22 games.