Gretna will play their next two 'home' SPL matches at Livingston's Almondvale Stadium, following drainage problems with the Fir Park pitch.
Several games have been postponed at Motherwell's home, which has been shared by Gretna this season.
Gretna, currently in administration, entertain Celtic at Almondvale on Sunday and Inverness on 5 April.
Motherwell visit Dundee United on Saturday and no decision has been made about their next home fixture.
Interview: Motherwell chairman John Boyle
"Talks are ongoing in relation to the Motherwell v Hibernian fixture on 29 March, with a range of options being explored," said SPL executive chairman Lex Gold.
The postponement of Saturday's Motherwell v Celtic game added to the fixture pile-up facing the SPL, with five matches still unscheduled ahead of the league split on 5 April.
And Gold added: "This
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