Clause 20

the appropriate authority of that country has, in respect of that request, failed to comply with the terms of any treaty, memorandum of understanding or other agreement between Singapore and that country;

the request relates to the investigation, prosecution or punishment of a person for an offence that is, or is by reason of the circumstances in which it is alleged to have been committed or was committed, an offence of a political character;

the request relates to the investigation, prosecution or punishment of a person in respect of an act or omission that, if it had occurred in Singapore, would have constituted an offence under the military law applicable in Singapore but not also under the ordinary criminal law of Singapore;

there are substantial grounds for believing that the request was made for the purpose of investigating, prosecuting, punishing or otherwise causing prejudice to a person on account of the person’s race, religion, sex, ethnic origin, nationality or political opinions;

the request relates to the investigation, prosecution or punishment of a person for an offence in a case where the person —

has been convicted, acquitted or pardoned by a competent court or other authority in that country; or

has undergone the punishment provided by the law of that country,in respect of that offence or of another offence constituted by the same act or omission as the first-mentioned offence;

the request relates to the investigation, prosecution or punishment of a person in respect of an act or omission that, if it had occurred in Singapore, would not have constituted a Singapore offence;

the offence to which the request relates is not an offence of sufficient gravity;

the thing requested for is of insufficient importance to the investigation or could reasonably be obtained by other means;

it is contrary to public interest to provide the assistance;

the appropriate authority fails to undertake that the thing requested for will not be used for a matter other than the criminal matter in respect of which the request was made, except with the consent of the Attorney-General;

in the case of a request for assistance under Division 2 or 6, the appropriate authority fails to undertake to return to the Attorney-General, upon his request, any thing obtained pursuant to the request upon completion of the criminal matter in respect of which the request was made; or

the provision of the assistance could prejudice a criminal matter in Singapore.

pursuant to the terms of any treaty, memorandum of understanding or other agreement between Singapore and that country;

if, in the opinion of the Attorney-General, the provision of the assistance would, or would be likely to, prejudice the safety of any person (whether in or outside Singapore);

if, in the opinion of the Attorney-General, the provision of the assistance would impose an excessive burden on the resources of Singapore; or

if that country is not a prescribed foreign country and the appropriate authority of that country fails to give an undertaking to the Attorney-General that that country will, subject to its laws, comply with a future requirement by Singapore to that country for assistance in a criminal matter.