Part V of Chapter 1 is about the powers of the parliament. Section 51 deals with powers of the Commonwealth parliament and are called "specific powers". There are also "concurrent powers", and both the Commonwealth and the States can make laws on these subjects. Federal law is more important if the laws are different (Section 109). Of the thirty-nine parts of section 51, a few have become very important in deciding how much power the Commonwealth government has in law. These include the Trade and Commerce Power, the Corporations Power and the External Affairs Power. Section 52 deals with powers that belong only to the Commonwealth parliament. States cannot make laws on these subjects.