Are the SAPS allowed to used their nose instead of a warrant to search you if they smell could only smell dagga?

Police need warrant to open package that reeks of pot, court says
www.latimes.com
SAN FRANCISCO — Police need a warrant to open a package in the mail that reeks of marijuana, the California Supreme Court ruled unanimously Thursday, rejecting a prosecutor’s arguments that a search was warranted under a novel “plain smell” test. …read more