The common law authorizes search incident to a lawful arrest. It requires neither a warrant nor independent reasonable and probable grounds. This is justifiable because the arrest itself requires reasonable and probable grounds or an arrest warrant. If the arrest itself is later found to be invalid then the search will also be invalid. Cloutier v. Langois, 1990 CanLII 122 (SCC), [1990] 1 S.C.R. 158, at pp. 182, 184, 185.
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