It would seem to me that most of this BS is driven by pilocks in govt departments, uni academics, training facilitors, manufactures and large end users, at the end of the day the contractors have to abide by the BS. If it is really seen as an issue, then regulate the industry properly, like the gas, electrical or petro chem industries (only those who are time served and fully qualified are allowed to undertake refrigeration/AC work) Refresher courses to keep up with changes in technology. (you will never stop those who will break the law regardless)