Primary law is found in written constitutions and enactments of the legislature, rulings and regulations issued by authorized administrative bodies and written opinions of the courts and court rules.
Secondary sources interpret and discuss primary law.
Secondary sources include treatises, periodicals and journals, form books, citators and loose-leaf services. Full treatment of legislative history is available from the Government Documents Collection of the Library of Michigan. Regulations in the Federal Register and the Code of Federal Regulations. Administrative opinions available through the government depository system. Regulations in the Michigan Administrative Code, annual supplements and Michigan Register.