vince123123 said:
good post, but doesn't really answer the question.
since you still don't understand, let's try this again step-by-step with more excerpts from the Internal Security Act:
"48. —(1) If in the opinion of the President public security in any area in Singapore is seriously disturbed or threatened by reason of any action taken or threatened by any substantial body of persons, whether inside or outside Singapore, to cause or to cause a substantial number of citizens to fear organised violence against persons or property, he may, if he considers it to be necessary for the purpose of suppressing such organised violence, proclaim such area as a security area for the purposes of this Part."
Comment: Singapore as a whole is seriously threatened by terrorist organisations such as JI and Al Qaeda, and is designated as a security area. Key installations and high security areas such as the Airport and MRT stations are now subjected to patrols and checks by security forces.
"62. Without prejudice to the operation of Chapter V and Chapter XXIII of the Penal Code, any person who whether within or outside a security area, while any proclamation under section 48 is in force, attempts to commit, or does any act preparatory to the commission of an offence under this Part shall be deemed to be guilty of that offence under this Part."
Comment: Taking photographs of a key installation can be considered an act preparatory to the commission of a terrorist act which is an offence under the ISA. The case of the 15 JI suspects quoted earlier with evidence of photographs taken by them of shuttle bus movements as well as the layout of Paya Lebar Airport for target surveillance is a prime example.
"66. —(1) When on duty any police officer or any member of the security forces or any person who is authorised in writing to do so by the officer in charge of a division, may without warrant and with or without assistance stop and search any vehicle, vessel, train, aircraft or individual, whether in a public place or not, if he suspects that any article or material being evidence of the commission of an offence under this Part is likely to be found in such vehicle, vessel, train, aircraft or on such individual, and may seize any article or material so found."
Comment: Therefore, if you take unauthorised survey photographs of a key installation such as an MRT station, you may be asked to delete your photographs or have your film confiscated, if the security forces patrolling the area find your activity suspicious.