The contents of this article complement those of the recently published FAL Bulletin No. 201, which referred to the rules of origin included in economic integration agreements signed by members of the Latin American Integration Association (LAIA). On this occasion the relationship between rules of origin and facilitation of international trade in goods is examined. The contents of both this issue and of FAL Bulletin No. 201 have been taken from a more extensive document written by the same author, which is publication No. 28 of the ECLAC Comercio Internacional Series, Normas de origen y procedimientos para su administración en América Latina, of May 2003.