This paper uses the example of the control of medicinal liquor during prohibition in Alberta to explore how the methods of control altered during the eight years of prohibition. This paper argues that the system used to control medicinal liquor changed from a prosecutorial system to a regulatory system. This shift from prosecution to regulation was essential in ensuring that medicinal liquor was actually controlled and allowed medicinal liquor to become an alternative as well as an exception to prohibition. This paper focuses on explaining the success of administrative control rather than the courts' attempts to control administrative action and thus examines administrative law and practice from the ground up. Consequently, this paper uses a broad definition of administrative law which includes the regulations, policies and practices created and used by the provincial state in its attempt to control medicinal liquor.