Euan Norris will take charge of Celtic’s League Cup semi-final against Falkirk on Sunday with Stevie McLean refereeing the previous days Kilmarnock v Ayr United match.
The appointments suggest that both officials are making progress through the ranks as the SFA attempt to add to their rota of referees capable of handling Celtic v Rangers matches with only Craig Thomson, Calum Murray and Willie Collum having taken that fixture on more than one occasion.
Norris was in the headlines earlier in the season when he awarded Rangers two penalties away to Inverness Caley Thistle but has kept a relatively low profile since then.
In his only Celtic appointment of the season he handed out four yellow cards in the 2-0 win away to St Johnstone last month.
Charlie Richmond makes a surprise return to the SPL on Saturday taking charge of the Rangers v Hibs match at Ibrox.
The Ayrshire whistler has been touring the lower reaches of the game since his disastrous performance in the Motherwell v Celtic match in November but appears to have worked his way back into favour.
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