All posts are to abide strictly to the following chapters of the Singapore Statutes:
Chapter 213, Official Secrets Acts... for example....
Wrongful communication, etc., of information.
5. Â—(1) If any person having in his possession or control any secret official code word, countersign or password, or any photograph, drawing, plan, model, article, note, document or information which Â—
(a) relates to or is used in a prohibited place or anything in such a place;
(b) relates to munitions of war;
(c) has been made or obtained in contravention of this Act;
(d) has been entrusted in confidence to him by any person holding office under the Government; or
(e) he has obtained, or to which he has had access, owing to his position as a person who holds or has held office under the Government, or as a person who holds, or has held a contract made on behalf of the Government or any specified organisation, or as a person who is or has been employed under a person who holds or has held such an office or contract,
does any of the following:
(i) communicates directly or indirectly any such information or thing as aforesaid to any foreign Power other than a foreign Power to whom he is duly authorised to communicate it, or to any person other than a person to whom he is authorised to communicate it or to whom it is his duty to communicate it;
(ii) uses any such information or thing as aforesaid for the benefit of any foreign Power other than a foreign Power for whose benefit he is authorised to use it, or in any manner prejudicial to the safety or interests of Singapore;
(iii) retains in his possession or control any such thing as aforesaid when he has no right to retain it, or when it is contrary to his duty to retain it, or fails to comply with all lawful directions issued by lawful authority with regard to the return or disposal thereof; or
(iv) fails to take reasonable care of, or so conducts himself as to endanger the safety or secrecy of, any such information or thing as aforesaid,
that person shall be guilty of an offence.
(2) If any person receives any secret official code word, countersign, password, or any photograph, drawing, plan, model, article, note, document or information knowing, or having reasonable ground to believe, at the time when he receives it, that the code word, countersign, password, photograph, drawing, plan, model, article, note, document or information is communicated to him in contravention of this Act, he shall be guilty of an offence unless he proves that the communication to him of the code word, countersign, password, photograph, drawing, plan, model, article, note, document or information was contrary to his desire.
(3) In any proceedings against a person for an offence under this section, where it is proved that that person is or has been in the employment or service of any foreign Power or government in breach of any undertaking which he has made with the Government or any specified organisation, he shall be deemed to be in possession or control of such information or thing as is referred to in subsection (1) and to have unlawfully communicated that information to a foreign Power or to have used that information or thing in a manner prejudicial to the safety or interests of Singapore.
(4) In subsection (3), Â“undertakingÂ” means any undertaking in writing which a public officer or any other person has made with the Government or any specified organisation whereby the officer or person undertakes not to serve or be employed by any foreign Power or government within a specified period after his retirement or resignation from the public service or that specified organisation or otherwise unless he has obtained the prior approval of the Government.
Chapter 143, Internal Security Act.... for example....
Disclosure of information.
16. Nothing in this Chapter or in any rules made thereunder shall require the Minister or any member of an advisory board or any public servant to disclose facts or to produce documents whose disclosure or production he considers to be against the national interest.
Prohibition of printing, sale, etc., of documents and publications.
20. Â—(1) Where it appears to the Minister charged with the responsibility for printing presses and publications that any document or publication Â—
(a) contains any incitement to violence;
(b) counsels disobedience to the law or to any lawful order;
(c) is calculated or likely to lead to a breach of the peace, or to promote feelings of hostility between different races or classes of the population; or
(d) is prejudicial to the national interest, public order or security of Singapore,
he may by order published in the Gazette prohibit either absolutely or subject to such conditions as may be prescribed therein the printing, publication, sale, issue, circulation or possession of such document or publication.
Refer to http://statutes.agc.gov.sg for all info