A more thorough explanation:

A slip law is a pamphlet that contains a single law that has just been passed by a legislative body. It is printed immediately after its passage, but before it is included in the general laws. Slip laws are also known as slip-law prints.

For example, when the U.S. Congress passes a new law, it is first printed as a slip law. This slip law is then distributed to government agencies, libraries, and other interested parties. Later, the law will be included in the U.S. Statutes at Large, which is a compilation of all the laws passed by Congress.

Another example is when a state legislature passes a new law. The law will be printed as a slip law and distributed to various organizations and individuals. Later, the law will be included in the state's session laws, which is a compilation of all the laws passed during a legislative session.

These examples illustrate how slip laws are used to quickly distribute new laws to interested parties before they are included in the general laws. Slip laws are important because they allow people to stay up-to-date on the latest laws and regulations.