Article 175 of Civil Code

1 - A contract may contain any condition agreed upon by the contracting parties, provided it is not prohibited by law or contrary to public order or good morals. 2 - If a condition contained in the contract is unlawful, the condition shall be void and the contract valid, unless one contracting party proves that he would not have agreed to the contract without it, in which case the contract shall be void. 3- Cause