Commercial contracts are agreements regulating business relationships between individuals or businesses where they agree to perform some actions or refrain from doing others.
Commercial contracts are usually in writing, but they can also be verbal.
The objective of the UNIDROIT Principles is to establish a balanced set of rules designed for use throughout the world irrespective of the legal traditions and the economic and political conditions of the countries in which they are to be applied.
It is generally recognized that the parties, i.e., you and your business partner(s), are free to choose and agree on the terms and conditions in your contract (freedom of contract).
Some of the large international organizations aim to harmonize the substantive rules in international trade and business.