And here I was thinking that visibility was part of the minima criteria....
AERODROME METEOROLOGICAL MINIMA (Ceiling and Visibility Minima) — The minimumheights of cloud base (ceiling) and minimum values of visibility which are prescribed in pursuanceof CAR 257 for the purpose of determining the usability of an aerodrome either for take-off orlanding.
MINIMUM ALTITUDE — The minimum altitude for a particular instrument approach procedure is the altitude at which an aircraft shall discontinue an instrument approach unless continual visual reference to the ground or water has been established and ground visibility is equal to or greater than that specified for landing. (Applicable to DA/MDA on procedures designed to an earlier edition of PANS-OPS, Document 8168.)
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Anyway it's crazy. JQ can operate to 0.1 RNP minima in ZQN, but are still restricted by the regulator to 0.3 RNP in Aus.