Referee appointments for this weekend's games in the Ladbrokes Premiership, Championship, League 1 and League 2.
Ladbrokes Premiership - Saturday
Celtic v Motherwell - Kevin Clancy
Heart of Midlothian v Hamilton Academical - Bobby Madden
Partick Thistle v Hibernian - Craig Thomson
Ross County v Dundee - Steven McLean
St Johnstone v Kilmarnock - John Beaton
Ladbrokes Championship - Saturday
Dundee United v Dunfermline Athletic - Euan Anderson
Greenock Morton v Brechin City - Alan Newlands
Livingston v Falkirk - Alan Muir
Queen of the South v Inverness Caley Thistle - Barry Cook
St Mirren v Dumbarton - Andrew Dallas
Ladbrokes League 1 - Saturday
Airdrieonians v Forfar Athletic - Gavin Ross
Arbroath v Stranraer - Graham Beaton
Ayr United v Albion Rovers - Craig Charleston
Queen's Park v East Fife - Ryan Milne
Raith Rovers v Alloa Athletic - Colin Steven
Ladbrokes League 2 - Saturday
Annan Athletic v Elgin City - John McKendrick
Berwick Rangers v Stirling Albion - Scott Lambie
Clyde v Montrose - David Lowe
Cowdenbeath v Stenhousemuir - Steven Kirkland
Peterhead v Edinburgh City - Steven Reid
Ladbrokes Premiership - Sunday
Aberdeen v Rangers - Willie Collum (Sky Sports, 12.30pm)
Ladbrokes League 2 - Tuesday
Stirling Albion v Peterhead - Craig Napier