ECARS registration Published May 16, 2013 WESTOVER AIR RESERVE BASE, Mass. -- The Employee-Certification and Reporting System (ECARS) is coming to Westover. The Environmental Management shop staff will roll out a new requirement in May for all base federal employees to certify that their vehicles comply with the Emissions standards for Massachusetts. An ECARS email will instruct how to enter vehicle information, and certify as required. This is a federal Clean Air Act initiative. More information will be available soon.