In gall stone pancreatitis , ercp and spincteroctomy s/b done within 48 or 72 hours?

In gall stone pancreatitis , ercp and spincteroctomy s/b done within 48 or 72 hours?

Only if jaundice is not getting relieved and Lft is deranged

But what is the cut off timeline ? is it 48 or 72 hrs?