—(1) Where the information so filed or recorded under section 14 or 15 relates to a non-arrestable offence —
the case shall thereupon be investigated by a police officer;
the informant shall, by order of a police officer, be referred to a Magistrate; or
a police officer may refer the case to a mediator of a Community Mediation Centre, established under the Community Mediation Centres Act (Cap. 49A), for mediation.
(2) In investigating such a case, a police officer may, by order of the Public Prosecutor or a Magistrate, exercise any of the special powers of investigation under sections 21, 22, 34, 39 and 111.
(3) A police officer receiving an order of the Public Prosecutor or a Magistrate as referred to in subsection (2) may also exercise the same powers in respect of the investigation as he may exercise without an order in an arrestable case, except the power to arrest without warrant.
(4) Any informant referred to a Magistrate under subsection (1) shall be supplied with a copy of any report filed or recorded under section 14 or 15 on which shall be endorsed the name of the police station or place at which the information was so filed or recorded.
(5) A police officer must record his reasons if he decides not to investigate into any non-arrestable case.