What is Substantive Law?

Substantive law says what you can or cannot do. A substantive law defines a legal relationship or prohibits certain conduct.

For example, a state that says, though shalt not steal. This would be a substantive law.

What is Procedural law?

Procedural law  dictates how the substantive law is administered or carried out. It determines how you must do something.

For example, a state statute reads, an individual has 30 days to file a response to a civil complaint. This is a procedural law dictating how to carry out a civil action.