Other procedural privileges
15.—(1)  No penalty by way of committal or fine shall be imposed in respect of any failure or refusal by or on behalf of a State to disclose or produce any document or other information for the purposes of proceedings to which it is a party.
(2)  Subject to subsections (3) and (4) —
(a)relief must not be given against a State by way of injunction or order for specific performance or for the recovery of land or other property; and
(b)the property of a State must not be subject to any process for the enforcement of a judgment or an arbitration award or, in an action in rem, for its arrest, detention or sale.
(3)  Subsection (2) does not prevent the giving of any relief or the issue of any process with the written consent of the State concerned; and that consent (which may be contained in a prior agreement) may be expressed so as to apply to a limited extent or generally; but a provision merely submitting to the jurisdiction of the courts is not to be regarded as a consent for the purposes of this subsection.
(4)  Subsection (2)(b) does not prevent the issue of any process in respect of property which is for the time being in use or intended for use for commercial purposes.
(5)  The head of a State’s diplomatic mission in Singapore, or the person for the time being performing his or her functions, is deemed to have authority to give on behalf of the State the consent mentioned in subsection (3) and, for the purposes of subsection (4), his or her certificate to the effect that any property is not in use or intended for use by or on behalf of the State for commercial purposes must be accepted as sufficient evidence of that fact unless the contrary is proved.