The Scottish Professional Football League will wait to see what its match delegate has to say before deciding whether to take action against Rangers over sectarian chanting during Monday's clash with Hibernian.
The banned Billy Boys song could be clearly heard being sung by the home support during the Scottish Championship fixture.
Now the club could face potential punishment if the SPFL's delegate decides to raise the matter when he submits his report on the match, won 4-2 by Mark Warburton's team.
A league spokesman said: "There was a delegate at the match and we will receive his report in due course. Until we see that report we are not in a position to comment."
In 2006, Uefa fined Rangers and also ordered the club to make a public announcement at all their home games pointing out the chanting of the Billy Boys was banned after it was heard during a Champions League clash with Villarreal.
Meanwhile Rangers striker Martyn Waghorn insists the Ibrox side are favourites to win the Championship - because they are man for man better than title rivals Hibernian.
"We heard what had been coming out of the Hibs camp in the build-up and to be honest I think they were just doing it to get themselves motivated," said Waghorn. "We don't need to get involved in that stuff. Ultimately we've got the better players and we'll do our talking on the park."