The SPL issued a document explaining the rationale behind the scheduling of the post-split fixtures, saying the only way the issue could be avoided is if the same six teams had ended up in the top six as last season.
Celtic will host Hearts on the final day of the season, 24 May, while Rangers will travel to Tannadice to face Dundee United.
Meanwhile, Rangers manager Walter Smith admits his side are bracing themselves for a tough title run-in after their a narrow victory over Hibernian.
Hibs secured a top-six slot courtesy of Motherwell's defeat to St Mirren and forced Rangers to grind out another hard-fought win.
Smith believes life is going to get even tougher in the final five games of the campaign as Rangers try to supplant Celtic at the top of the table.
"I think Sunday's game showed the difficulty we have," he said.
"There will be some really tough games between now and the end of the season.
"Hibs are the team who have qualified in sixth place and that was a really competitive game."
In the bottom six, Hamilton will travel to Inverness for a third time while bottom club Falkirk face a third trip to Kilmarnock. All four clubs are currently embroiled in a relegation battle, along with St Mirren.
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