The Association of American Feed Control Officials (AAFCO) is a non-profit organization which sets standards for the quality and safety of animal feed (fodder) and pet food in the United States. AAFCO is a voluntary organization consisting largely of state officials who have responsibility for enforcing their state's laws and regulations concerning the safety of animal feeds. AAFCO also establishes standard ingredient definitions and nutritional requirements for animal feed/pet food. Most states have adopted the AAFCO models or use them in the regulation of animal feed/pet food. AAFCO meets twice yearly, typically in January and August, so that committees and the board of directors can conduct the organization's business of assessing the need for changes to the Model Bill, model regulations, ingredient definitions, etc. Once per year, the latest version of all AAFCO-approved documents is printed in the organization's Official Publication.