Thanks Viper.
I think your reference is 2004. I have found a 2011 copy and things have significantly changed since the 2004 revision !!!
The 2011 version differentiates - Operator, Instructor, & Master Trainer.
Refresher training for all speed measuring devices is 36 months for an Operator, and 60 months for an Instructor.
This is very different than you 2004 copy as well as the Policy Manuals that are present on many PSB web sites ( e.g. York Region and Brantford).
Is there any chance the OPP are operating at the level of York Region (i.e. 24 months with no differentiation between Operator and Instructor)? If not, I suspect the best option now would be to discuss a plea at the pre-trial review? Would it be worth discussing with the Prosecution my question about the 24 month certification in an attempt to see if they know something I don't? Is there any risk in doing so? If I say my suspicion is 24 months and they are outside of their certification period - would the prosecution correct my facts for the record?