The following excerpt is from Xiao, Guo-Yang v. Canada (Minister of Citizenship and Immigration), 1998 CanLII 7897 (FC):
Secondly, although the Minister may issue guidelines and other non-binding instruments as a matter of administrative practice, even if such a policy existed in 1997, it acted as much more than a mere guideline in this instance: it was clearly mandatory in nature and the application had a legal effect. The Minister's authority to make such requirements is derived exclusively from the relevant legislation: Friends of the Oldman River Society v. Canada (Minister of Transport), 1992 CanLII 110 (SCC), [1992] 1 S.C.R. 3 at 35. I cannot find any authority in the Immigration Act, the Immigration Act Regulations, 1978, or the Immigration Act Fees Regulations for such a requirement. It is no answer for the Minister to state that nothing in the Act or Regulations prohibit him from making it. His authority must be found in explicit and positive language in a relevant statute or regulation. Here, the Immigration Act Fees Regulations are not even ambiguous on the issue; they are entirely silent on whether applications may be returned for overpayments.
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