Sigmazxcs, seek to first understand the local laws. You should read up on the Arms & Explosives Act and the Corrosive & Explosives Substances & Offensive Weapons Act. Read also the Singapore Police Force website.
Here's an extract from the CESOW Act as to how wide-reaching the laws are crafted:
Corrosive and Explosive Substances and Offensive Weapons Act
(CHAPTER 65)
(Original Enactment: Ordinance 26 of 1966)
REVISED EDITION 1985
(30th March 1987)
An Act to provide certain penalties relating to the unlawful possession of corrosive and explosive substances and the carrying of offensive and scheduled weapons.
[16th September 1963]
Short title
1. This Act may be cited as the Corrosive and Explosive Substances and Offensive Weapons Act.
Interpretation
2. In this Act, unless the context otherwise requires —
“corrosive substance” means any of the acids and substances specified in the First Schedule, and shall be deemed to include all substances which are capable on application to the human body of causing hurt through corrosive action;
“explosive substance” shall be deemed to include any materials for making any explosive substance and any bomb, grenade, apparatus, machine, implement or material used or intended to be used or adapted for causing or aiding in causing any explosion in or with any explosive substance and any part of such bomb, grenade, apparatus, machine or implement;
“hurt” means hurt as defined in the Penal Code (Cap. 224);
“offensive weapon” includes any instrument which if used as a weapon of offence is likely to cause hurt;
“scheduled weapon” means any offensive weapon specified in the Second Schedule.
Carrying offensive weapons in public places
6.—(1) Any person who in any public road or place carries or has in his possession or under his control any offensive weapon otherwise than with lawful authority or for a lawful purpose shall be guilty of an offence and shall be liable on conviction to imprisonment for a term not exceeding 3 years and shall also be punished with caning with not less than 6 strokes.
(2) In any prosecution for an offence under subsection (1), the onus of proving the existence of a lawful purpose shall lie upon the accused.
(3) A weapon shall be presumed to be carried with lawful authority if it is carried —
(a)by a member of the Singapore Armed Forces or of the Singapore Police Force or of any visiting force lawfully present in Singapore under the provisions of any law relating to visiting forces; or
(b)by any person as part of his official or ceremonial dress on any official or ceremonial occasion.
(4) An offence under subsection (1) shall be deemed to be a seizable and non-bailable offence.
[63/73]
Offences relating to scheduled weapons
7.—(1) Any person who, otherwise than for a lawful purpose —
(a)carries or has in his possession or under his control;
(b)manufactures, sells or hires or offers or exposes for sale or hire; or
(c)lends or gives to any other person,
any scheduled weapon shall be guilty of an offence and shall be liable on conviction to imprisonment for a term not exceeding 5 years and shall also be punished with caning with not less than 6 strokes, and in the case of a second or subsequent offence to imprisonment for a term of not less than 2 years and not more than 8 years and shall also be punished with caning with not less than 6 strokes.
(2) In any prosecution for an offence under subsection (1), the onus of proving the existence of a lawful purpose shall be upon the accused.
(3) An offence under subsection (1) shall be deemed to be a seizable and non-bailable offence.
[63/73]
Consorting with persons carrying offensive weapons in public places
8.—(1) Any person who consorts with, or is found in the company of, another person who is carrying or has in his possession or under his control any offensive weapon in contravention of section 6, in circumstances which raise a reasonable presumption that he knew that that other person was carrying or had in his possession or under his control any such weapon shall, unless he shall prove that he had reasonable grounds for believing that that other person was carrying or had in his possession or under his control any such weapon for a lawful purpose, be guilty of an offence and shall be liable on conviction to the like punishment as that other person with whom he was consorting or in whose company he was found.(2) An offence under this section shall be deemed to be a seizable and non-bailable offence.
Powers of search and seizure
9.—(1) Any police officer may, without warrant and with or without assistance, stop and search any person or vehicle found in any public road or place if he has reasonable grounds for believing that any evidence of the commission of an offence under this Act is likely to be found on that person or in that vehicle, and may disarm that person and seize any offensive weapon, article or material or accumulation thereof capable of being used for causing hurt if he has reasonable grounds for believing that it is intended or likely to be used in the commission of an offence under this Act.(2) Any police officer may, without warrant and with or without assistance —
(a)stop and search any person or vehicle, whether in a public road or place or not;
(b)enter and search any premises;
(c)board and search any vessel, vehicle or aircraft not being, or having the status of, a naval, military or air force vessel, vehicle or aircraft,
if he has reasonable grounds for believing that any evidence of the commission or of the preparation for the commission of an offence under this Act is likely to be found on such person or premises or in any such vessel, vehicle or aircraft, and may seize any article or material or accumulation thereof capable of being used for causing hurt if he has reasonable grounds for believing that it is intended or likely to be used for the purpose of causing hurt, and any such evidence so found and any vessel, vehicle or aircraft in which that article, material or evidence is found.
[21/73]
(3) No woman shall be searched under this section except by a woman.
SECOND SCHEDULE
Section 2.
Scheduled Weapons
1. Any knife, sometimes known as a flick knife, which has a blade which opens automatically by hand pressure applied to a button, spring or other device in or attached to the handle of the knife.
2. Any knife, sometimes known as a gravity knife, which has a blade which is released from the handle or sheath thereof by the force of gravity or the application of centrifugal force and which, when released, is locked in place by means of a button, spring, lever or other device.
3. Any whip manufactured from bicycle or motor cycle chains or from any similar kind of chainwork.
4. All kinds of knuckledusters.
5. Any blade or other instrument attached to or forming part of a bicycle pump, metal-pipe or stick, and concealed therein, which is capable of being used for cutting or stabbing.
6. Any sword, machete or parang, axe, sickle, bearing scraper, spear, bayonet, iron rod, and the nancha-ku (segments of wood or metal joined by a chain, leather strap or cord).
7. Any knife, sometimes known as a wasp knife, which is capable of injecting a ball of compressed gas that freezes both human and animal tissues and organs surrounding the point of injection.
[S 378/2009 wef 26/08/2009]