(a) cooperate, as from the entry into force of the Treaty of Lisbon, with a view to achieving approved objectives concerning the level of investment expenditure on defence equipment, and regularly review these objectives, in the light of the security environment and of the Union's international responsibilities;
(a) comhoibriú, amhail ó Chonradh Liospóin a theacht i bhfeidhm, d'fhonn cuspóirí formheasta a bhaint amach maidir le leibhéal an chaiteachais infheistíochta ar threalamh cosanta, agus na cuspóirí sin a athbhreithniú go tráthrialta i bhfianaise thimpeallacht na slándála agus fhreagrachtaí idirnáisiúnta an Aontais;