November 14–16, 1984: First session of the COMCEC in Istanbul September 4–7, 1988: At the fourth session of the COMCEC in Istanbul, the states adopted basic guiding principles to set up a trade preferential system among OIC Member States (Declaration of Intent).[3] October 7–10, 1990: At its sixth summit, COMCEC is presented a draft framework agreement on the Trade Preferential System which will be adopted afterwards.[4]