(1) On an application made by a police or customs officer, a magistrates' court or a justice of the peace may make an order extending the period for which a substance may be retained under section 59 if satisfied that -
(a) the condition in subsection (2) is met, or
(b) the condition in subsection (4) is met.
(2) The condition in this subsection is that the continued retention of the substance is justified -
(a) while its intended use is further investigated, or
(b) while consideration is given to bringing (in the United Kingdom or elsewhere) proceedings against any person for an offence with which the substance is connected.
(3) If the condition in subsection (2) is met, an order under this section may authorise the retention of the substance for a specified period ending no later than the 60th day after -
(a) the date of seizure, in the case of a substance seized under section 55 or 56, or
(b) the end of the period referred to in section 59(2)(b), in any other case.
(4) The condition
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