Then on his/her radio he/she replies:
"GO (or VIA) 9xx (xxx), the switch at mile 2.48 Canpa Sub is now lined and locked for the (GO) North/ (Canpa) West track. You are ok to proceed, over."
GO (or VIA) 9xx (xxx) replies "Okay to proceed for the (GO) North/ (Canpa) West track, out."
However, if the tracks changed and his/her reply was/is "NO"
"GO (or VIA) 9xx (xxx), Canpa Spur Switch Tender standing by for when you have a permissive signal."
When the permissive signal is given the Switch Tender replies
"GO (or VIA) 9xx (xxx), the switch at mile 2.48 Canpa Sub is now lined and locked for the (GO) North/ (Canpa) West track. You are ok to proceed, over."
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