AIP GEN 3.3
4.4 An aircraft must not be flown under the IFR, lower than the published lowest safe altitude or the lowest safe altitude calculated in accordance with this section, except when being assigned levels in accordance with ATS surveillance service terrain clearance procedures or when being flown in accordance with a published DME arrival, instrument approach or holding procedure, or except when necessary during climb after departure from an aerodrome, or except during VMC by day (CAR 178 refers).
Is the Missed Approach part of the published approach? Yes. That's what allows you to be below LSAT while conducting it.
What does "execute a Missed Approach" prior to the MAPt legally mean? I asked for legal definitions. None of have been forthcoming. Many have stated how they personally interpret the regs. And that is my point: you can interpret the regs any way you see fit.