In December 2008, the PhRMA Board of Directors unanimously adopted measures to enhance the PhRMA Guiding Principles on Direct to Consumer Advertisements about Prescription Medicines. The revised Principles took effect March 2, 2009. Among its changes, the revised, voluntary Principles provide that companies should establish internal processes to assure adherence with the Principles. It also states that PhRMA will identify on its website all companies that announce their commitment to abide by the Principles and complete, at the appropriate time, an annual certification that they have policies and procedures in place to foster compliance with the Principles. The certification must be signed by the company’s Chief Executive Officer and Chief Compliance Officer for its United States pharmaceutical business.