Parties undertake to respect one another’s territorial integrity and sovereignty and, in particular, observe the principle of non-interference in the internal affairs of one another. 2. No action shall be taken to assist any State Party in terms of this Pact, save at the State Party’s own request or with its consent, except where the Summit decides that action needs to be taken in accordance with the Protocol. Article 8 Destabilising Factors State Parties undertake not to nurture, harbour or support any person, group of persons or institutions whose aim is to destabilise the political, military, territorial and economic or social security of a State Party. Article 9 Defence Cooperation In order to realise the objective of this Pact, State Parties shall cooperate in defence matters and facilitate interaction among their armed forces and defence-related industries in the following and any other areas of mutual interest: a) the training of military personnel in any field of military endeavour and, to that end, they may from time to time hold joint military exercises in one another’s territory. b) exchange military intelligence and information in all relevant matters subject to any restrictions or otherwise of national secu-rity; and c) joint research, development and production under license or otherwise of military equipment, including weapons and munitions, and to facilitate the supply of, or the procurement 77