A Government Gazette entry using the words 'authorised to conduct breath analysis' rather than the precise statutory language 'authorised to operate breath analysing instruments' is a valid certificate under s 47K(3)(a) of the Road Traffic Act 1961 (SA), and the typed name of the Commissioner of Police at the foot of the entry satisfies the requirement that the certificate purport to be signed. An authorisation dated to a specific past date is to be read as continuing from that date until withdrawn.
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