BOOK III NAVIGATION AND MARITIME TRADE Title I GENERAL PROVISIONS Article 823. The provisions of this Book apply: 1 At all events related to navigation, which have occurred at sea, regardless of feature size or purpose of the ship or object involved or affected by such events, subject in certain matters specifically provided its application to other forms of navigation, and 2 All the acts or contracts that relate to navigation and maritime trade, including those relating to spacecraft, unless this book allows other rules stipulate. Do not apply to warships, whether domestic or foreign. Article 824. Except where the law provides a different penalty, shall be considered unwritten stipulations contrary to a mandatory provision of this Book. Article 825. In matters governed by this Book, the custom may be proved, in addition to the forms stated in Article 5 of the Code, expert report, the court assessed according to the rules of soun...