I was flying near CYPK the other day and for convenience and since I was close to it, reported as being "above the blasting area". My instructor pointed out better not to do that. That made me think about the legality of flying above a blasting area but I couldn't find anything about that, neither in the AIM, nor in the CAR.

On my VTA a blasting area is shown as a "striped circle", similar to a circular special use airspace. The CFS legend for that symbol says "CAUTION BLASTING AREA. Do not overfly at less than 3000' AGL". The CFS entry for Pitt Meadows CYPK says "Quarry blasting ops ... to 300 AGL".

Obviously it's a good idea to stay away from a blasting area and having read a bit about it since then, I won't fly over it below ~3500' in the future. For closure and future reference I would like to know:

What are the Canadian regulations around flying over/near blasting areas?