Neil Lennon has accepted his touchline ban from the Scottish Football Association and the Celtic manager admits the punishment is a warning.
The SFA dished out a three-match ban, with a further three games suspended, on Thursday after Lennon confronted referee Euan Norris after last month's Scottish Cup semi-final defeat by Hearts.
He watched from the stands as Celtic beat St Johnstone 1-0 on Thursday evening and aims to learn from his latest sanction after recently serving a two-match touchline ban.
Lennon said: "All I will say is that I got a fair hearing, I think the punishment is pretty fair as well.
"I expected to be punished. I have apologised to the referee in correspondence and he has responded and he is grateful of that and we move on.
"The judicial panel don't want to be punishing people, but when you cross the line I expected to be punished and I have been and I am going to learn from this.
"I will have a suspension hanging over my head and that is a warning for me.
"If I step out of line again I could get three matches plus and I don't want that."
Anthony Stokes, one of seven changes to Lennon's side, struck from close range in the 29th minute after strike partner Mo Bangura had caused some confusion in the visitors' defence following a corner.
In injury-time Gary Hooper deprived fellow substitute Rabiu Ibrahim of a debut Celtic goal when, with the Nigerian substitute's close-range shot going in, he helped the ball over the line only to be flagged offside.
Lennon could afford a smile when he said: "I am going to fine Gary for that. I think he should pay a goal bonus to the wee man.
"It looked as if it was going in but Gary is Gary, he wants to be leading goalscorer in the country; let's just say it was instinctive.
"I was very pleased. It was another clean sheet, 24, that's a record. It takes us to 90 points with two games to go and that's tremendous consistency after 92 last season."