Wow., what a weird legalistic document, says almost nothing technical (must be in the attachments...).You might want to give the Christie & Walther frequencies or trunk systems a listen and see if they are on one of those, as per a by-law passed in 2012.
CORPORATION OF THE CITY OF CLARENCE-ROCKLAND
BY-LAW NO. 2012-108
BEING A BY-LAW TO AUTHORIZE THE CORPORATION OF THE CITY OF CLARENCE-ROCKLAND TO SIGN AN AGREEMENT WITH CHRISTIE-WALTHERS COMMUNICATIONS LTD.
I vaguely recall activity on 462.775 repeater but that was years ago. Also 410.5625 was a RocklandThx for the replies but hope there is more comming.