These changes come out of consultation with the legislative drafters, who reviewed other environmental statutes and advised that this wording was more current with how governments were drafting provisions to clarify the liability--or not--for officers involved in enforcement. That is precisely why that wording was selected. It is not my wording; it is wording drawn from other statutes. Particularly in Alberta, the Environmental Protection and Enhancement Act has added those specific words. My understanding is that that was done to make it very clear that the government intends to absolve their agents and officials and officers from liability, but only in very constrained situations, so it defines much more clearly the situations where they would be absolved of liability.
On May 7th, 2009. See this statement in context.