§53. Exclusion from gross income; income from carriage on high seas
Income received by a corporation, company, firm, domestic or foreign, or by an individual, resident or non-resident, actively and primarily engaged in the business of operating steamships, from the carrying of goods or passengers, or both, in interstate or foreign commerce on the high seas, or from the rental of boats and ships used in the carrying of goods or passengers, or both, in interstate or foreign commerce on the high seas, shall not be included in gross income and shall be exempt from taxation under this Chapter.