3. There shall also be exempt from section 6(1) of the Act —
(a)
any person who is a member of the crew of any fishing vessel registered or licensed in Singapore and engaged exclusively in fishing who, having left the territorial waters of Singapore in such vessel, returns to Singapore in the course of the same voyage; and
(b)
any person entering Singapore on a direct journey from West Malaysia (other than a person whose presence in West Malaysia in unlawful under the provisions of any written law for the time being in force in West Malaysia relating to passports or immigration, or whose entry into Singapore has been prohibited by order made under the Act) who is —
(i)
a member of the Singapore Police Force or of the Royal Malaysia Police in possession of a certificate of appointment or an identifying warrant card, travelling on duty;
(ii)
a member of the Singapore Immigration Service or of the West Malaysia Immigration Service in possession of an identifying authority card, travelling on duty; or
(iii)
a member of the Singapore Customs Service or of the West Malaysia Royal Customs Service in possession of an identifying authority card, travelling on duty.