In response to requests from interested parties, the Department of Commerce is conducting an administrative review of the antidumping duty order on gray portland cement and clinker from Mexico. The review covers exports of subject merchandise to the United States during the period August 1, 2002, through July 31, 2003, and one firm, Cemex and its affiliate, GCC Cemento. The Department has preliminarily determined that sales were made below normal value during the period of review.