Approach Bans

It seems that Approach Ban regulations are full of IFs ANDs and BUTs...  This is a classic example of there always being an exception to the rule!!

For some helpful examples, reference AIM RAC 9.19.2.

CAR 602.129 Approach Bans - General
(This does not apply to Part VII aircraft - see below)

• RVR minima for aeroplanes:
• if RVR A and B
• RVR A < 1200 ft and RVR < 600 ft
• if only RVR A or B
• either < 1200 ft
• If RVR is below minimums, you cannot continue an instrument approach in an IFR aircraft unless:
• aircraft has passed FAF (if no FAF, aircraft has intercepted final approach course)
• training flight and landing not intended
• RVR is fluctuating above and below
• ground visibility is reported as at least 1/4 mile
• PIC is conducting precision approach to CAT III minima
• (5) No PIC of an IFR aircraft shall commence a non-precision approach, an APV or a CAT I or CAT II precision approach to an airport where low-visibility procedures are in effect

CAR 602.130 Approach Bans - Category III

(This does not apply to Part VII aircraft - see below)

• (2) No person shall continue a CAT III precision approach in an IFR aircraft beyond the FAF inbound or, where there is no FAF, the point where the final approach course is intercepted, unless the RVR reported is equal to or greater than the minimum RVR specified in the Canada Air Pilot in respect of the runway or surface of intended approach for the instrument approach procedure conducted.

CAR 700.10 Approach Bans - Non Precision, APV, and CAT I Precision

• RVR minima change based on CAP advisory visibility, for example:
• CAP 1/2 (2600) >> RVR 3/8 (1600)
• CAP 3/4 (4000) >> RVR 5/8 (3000)
• CAP 1 (5000) >> RVR 3/4 (4000)
• If no RVR, use runway vis.  South of 60: if no runway vis, use ground vis. 
• If below minimums, you cannot continue a non-precision approach, an APV or a CAT I precision approach in an IFR aircraft unless:
• aircraft has passed FAF (if no FAF, aircraft has intercepted final approach course)
• training flight and landing not intended
• RVR is fluctuating above and below
• South of 60 with no RVR or runway vis: ground visibility is fluctuating above and below
• localized phenomenon affecting ground visibility
• approach is conducted in accordance with 703.41, 704.37, or 705.48
• exceptions made based on operator certificate, 2-crew ops, aircraft equipment (FD / AP), runway lighting, etc. 
• different tables:
• CAP 1/2 (2600) >> RVR 1/4 (1200)
• CAP 3/4 (4000) >> RVR 3/8 (2000)
• CAP 1 (5000) >> RVR 1/2 (2600)
• (4) No pilot-in-command of an IFR aircraft operated under this Part shall commence a non-precision approach, an APV or a CAT I precision approach to an airport where low-visibility procedures are in effect.