Then it says, "(b) for carrying out building work that is declared by the Governor-General by Order in Council to be a building method." So there could be something that's not using one or more products or things as part of building work, but, nevertheless, the Governor-General declares that it's a building method after all, and it's difficult to know what sort of criteria the Governor-General—or, at least, through the Minister—would use to decide that something was a building method, even though it didn't fit the definition that's already being given in the law. 