Public International Law (Vol. I & II)
Article 4
In time of public emergency threatening the life of the nation and officially proclaimed, a State Party may take measures derogating from its obligations only to the extent strictly required by the exigencies of the situation and only if such measures are not inconsistent with its other obligations under international law and do not involve prohibited discrimination.
No derogation from Articles 6, 7, 8 paragraphs 1 and 2, 11, 15, 16, and 18 may be made under this provision.