Ok, here it goes.
VFR non-built up areas
1. Fixed wing and rotary wing aircraft shall not be flown below 1 000 feet and 500 feet respectively AGL or water except when:
a. taking off, landing or conducting an authorized approach to an aerodrome;
b. low flying has been authorized for prescribed low flying areas, or over specifically prescribed low level, cross country routes that have been flight checked and environmentally assessed (in accordance with CFAO 36 50 and 1 CAD Orders Vol 2 (Flying Orders) Art 2-002 Section 5), or over land or water areas designated by the Commander 1 CAD for operational or operational training flights;
c. required by weather deteriorating to below minimum conditions on a VFR flight in order to maintain vertical separation from cloud while initiating alternative action. Then fixed wing aircraft are authorized to fly not below 500 feet and rotary wing aircraft not below 300 feet AGL or water; or
d. SVFR is authorized. Chapter 7, para-graph 3 and Figures 7 1 and 7 2 or higher established 1 CAD limits then apply.
VFR over built up areas
2. An aircraft shall not be flown over the built up area of any city, town or settlement, or over an open air assembly of persons, except at an altitude that will permit, in the event of an emergency, the landing of the aircraft without undue hazard to persons or property on the surfaces. Such altitude shall not in any case be less than 1 000 feet above the highest obstacle within a horizontal radius of 2 000 feet from the aircraft , except when taking off, landing, conducting an authorized low approach to an aerodrome, or when authorized by the Commander 1 CAD.
Now the fun stuff.....
Low flying
4. An aircraft shall not be flown lower than 50 feet over all obstacles that are within 200 feet of the track of the aircraft when flight is authorized for:
a. practice forced or precautionary landing approaches over a prescribed forced landing area; or
b. a low flying exercise over a prescribed low flying area.
5. Aircraft authorized to be flown over specifically selected low level, cross country routes shall not be flown lower than 250 feet above all obstacles that are within 500 feet of track
6. The minima prescribed in Chapter 5, paragraphs 4 and 5, shall not apply to aircraft engaged in operational flying training or operational exercises in areas specifically authorized for such flights by the Commander 1 CAD. The altitudes at which these flights will be conducted shall be set by the Commander 1 CAD and published in 1 CAD Orders.
1 CAD orders set out some even crazier limits. Maritime Helicopters in day VMC can manoeuvre at 40ft over the water while Tactical Helicopters are cleared down to 4ft (that's four feet) in Tactical Low Flying Areas.
A wee bit different than what's permitted in the CARS.
*edited to separate the rules and my commentary