A preliminary determination of the complaint by the domestic cement manufacturer, Caribbean Cement Company Limited, was due by July 29, in keeping with the normal 90-day provision of law.
That time frame can, however, be extended under special circumstances, such as that now being pleaded by the ADSC.
"The extension is due to the difficulty of obtaining satisfactory evidence in the investigation and other administrative and procedural challenges that made it unusually difficult for the commission to decide within the 90 days," the commissioners said in a statement.