The ICSID dispute settlement mechanism provides for three opportunities to evaluate the center’s jurisdiction: 1) At the registration stage pursuant to Article 36 of the ICSID Convention; 2) As preliminary objections on an expedite procedure pursuant to Article 41(5) of the ICSID Arbitration Rules; and 3) As preliminary objections pursuant to Article 41(1) of the ICSID Arbitration Rules. This article will analyze only the application of the expedite procedure to entertain preliminary objections specifically, the special procedure provided by CAFTA. As a result of the application of the expedite procedure pursuant to CAFTA - as analyzed in the Commerce Group v El Salvador and Pac Rim v El Salvador cases - one can conclude that Article 41(5) of the ICSID Arbitration Rules applies for every case in which a party raises such objections in so far as to the modifications agreed to by the parties in any Investment Treaty. In any case, the expedite procedure’s efficiency goal – as per the author’s judgment – has been attained in practice, and is therefore fulfilling its intention of getting rid of, on an expedite basis, of frivolous claims or claims without legal merits.