Massachusetts BD is a term that refers to the state's Board of Directors, which is a government agency that oversees the licensing and registration of all business entities in the Commonwealth of Massachusetts. It is responsible for the enforcement of laws and regulations pertaining to business entities, including the registration of corporations, limited partnerships, and limited liability companies. The Board of Directors also provides guidance to businesses on how to comply with the Massachusetts Business Corporation Law (MBC) and other relevant statutes. The Board is also responsible for conducting investigations into potential violations of the MBC and other laws, and for taking appropriate disciplinary action when violations are discovered. There are three types of Massachusetts BD: the Department of Corporations, which is responsible for the registration of corporations; the Office of Limited Partnerships, which is responsible for the registration of limited partnerships; and the Office of Limited Liability Companies, which is responsible for the registration of limited liability companies.