There is a problem with the safe to fly list. It was the most recent one that was available to the Air Staff to fast track the process, but it is out of date and very few of the boots listed are still available, or meet the Cdn requirement (not all boots on the list are approved for CAF use - eg. not the sage green boots or the safety boot versions). Attempts have been made to get an updated list from the USAF, get an in house list created and approved, and to have local support units use their best judgement in approving boots similar to those on the list that meet the standard.
Also check what the latest waivers from your flt readiness folks, as some have basically said wear anything that meets the basic standard for the army folks.