The Virginia Department of Professional and Occupational Regulation offers an Alternative Energy Systems (AES) specialty. As of December 2012, a special exam is required for this specialty on a contractor’s license. A licensed contractor (Class A, B, C) may declare the AES specialty. “Alternative energy system contracting” means that service which provides for the installation, repair or improvement, from the customer’s meter, of alternative energy generation systems, supplemental energy systems and associated equipment annexed to real property. This service does not include the installation of emergency generators powered by fossil fuels. No other classification or specialty service provides this function. This specialty does not provide for electrical, plumbing, gas fitting, or HVAC functions.