6. Refusal of assistance
(2)
(a) to the extent that it appears to the Central Authority aforesaid that compliance would be contrary to the Constitution of the Federal Republic of Nigeria, 1999 or would be prejudicial to the security, international relations or other essential public interests of Nigeria; or
4. In accordance with article 72, a State Party may deny a request for assistance, in whole or in part, only if the request concerns the production of any documents or disclosure of evidence which relates to its national security.