If an owner plans to use a yacht to carry passengers for hire, then the yacht must be certified by the U.S. Coast Guard and meet a variety of requirements. I have designed yachts to meet these requirements and also have prepared the calculations and supporting paper work for the owners of existing vessels to meet the USCG requirements.
In addition to working with the USCG, I have worked with ABYC, ABS, Lloyds, BV and DNV certification societies and I am familiar with their specific requirements and formats.