The ENERGY STAR program no longer has a separate specification or designation for external power supplies (EPS). This is explained and clarified at the ENERGY STAR program website, see:

http://www.energystar.gov/index.cfm?fuseaction=products_for_partners.showEPS

Since the ENERGY STAR PC standard specifications ver. 6.1, however, EPS are required to meet the international level V requirements, in order for the notebook to be qualified to ENERGY STAR and all adapters used on our ENERGY STAR products meet this requirement.

For a confirmation, please see EnergyStar Product Specifications.