Are poles adjusted in turf races when the rail is shifted?

[Dunbar]

A friend asked me this question, and I don't know the answer, even though I should:

"Are the poles movable? Depending on where the rails are set (zero, fifteen or thirty feet at SA, may be different at other tracks), the 1/4, 1/2, etc. poles should be moved forward as the rails move out. The quarter pole should have a very slight adjustment as it is usually near the end of the turn, but the half pole, when the rail is set at 30 feet, should be positioned 94 feet ahead of where it is when the rails are at zero. Is this the way it's done?

I'm sure the start of the race is moved forward, but I was wondering about the poles, too. Anyone know? "

--Dunbar