Amendment
legal act proposed in a bill or motion, that adds, changes, substitutes, omits or abolishes clauses to one or several other acts which previously adopted or projected / From Wikipedia, the free encyclopedia
An amendment is a formal or official change made to a law, contract, constitution, or other legal document. It is based on the verb to amend, which means to change. Amendments can add, remove, or update parts of these agreements. They are often used when it is better to change the document than to write a new one.