Sec. 26.
That cargo vessels documented under the laws of the United States may carry not to exceed sixteen persons in addition to the crew between any ports or places in the United States or its Districts, Territories, or possessions, or between any such port or place and any foreign port, or from any foreign port to another foreign port, and such vessels shall not be held to be "passenger vessels" or "vessels carrying passengers" within the meaning of the inspection laws and the rules and regulations thereunder: Provided, That nothing herein shall be taken to exempt such vessels from the laws, rules, and regulations respecting life-saving equipment: Provided further, That when any such vessel carries persons other than the crew as herein provided for, the owner, agent, or master of the vessel shall first notify such persons of the presence on board of any dangerous articles, as defined by law, or of any other condition or circumstances which would constitute a risk of safety for passenger or crew.
The privilege bestowed by this section on vessels of the United States shall be extended insofar as the foreign trade is concerned to the cargo vessels of any nation which allows the like privilege to cargo vessels of the United States in trades not restricted to vessels under its own flag.
Failure on the part of the owner, agent, or master of the vessel to give such notice shall subject the vessel to a penalty of $500, which may be mitigated or remitted by the Secretary of Commerce upon a proper representation of the facts.