51.—(1) The Commissioner may not at any time serve an nm entorcee-. °. sent in case €Nforcement notice on a data controller with respect to the processing a processing of personal data for the special purposes unless—
(a) adetermination under section 50(1) with respect to those personal data has taken effect; and
(b) the Court has granted leave for the notice to be served.
(2) The Court shall not grant leave for the purposes of subsection (1)(b) unless it is satisfied-—
(a) that the Commissioner has reason to suspect a contravention of the data protection standards which is of substantial public importance; and
(b) except where the case is one of urgency, that the data controller has been given, in accordance with rules of court, notice of the application for leave.
(3) The Commissioner may not serve an information notice ona data controller with respect to the processing of personal data for the special purposes unless a determination under section 50(1) with respect to those personal data has taken effect.
Failure to