Classify the following laws assubstantiveorprocedural:

1. A law that requires public schools to hold a hearing before a student is expelled.
2. A law that establishes a maximum interest rate for credit transactions at 24 percent.
3. A law that provides employee leave for the birth or adoption of a child for up to 12 weeks.
4. A law that requires the county assessor to send four notices of taxes due and owing before a lien can be filed