Paragraph 133
The regulations may provide that a ship which is not partnership property but which—
(a)
is owned by or chartered to a member (or two or more members) of a partnership, and
(b)
is a ship in relation to which activities of the partnership business are carried on,
shall be treated as if it were owned by or chartered to every member of the partnership and as if everything done by or to any of the partners in relation to it had been done by or to all the partners.