§ 6718. Failure to display tax registration on vessels
(b)
Multiple violations
In determining the penalty under subsection (a) on any person, subsection (a) shall be applied by increasing the amount in subsection (a) by the product of such amount and the aggregate number of penalties (if any) imposed with respect to prior months by this section on such person (or a related person or any predecessor of such person or related person).
(c)
Reasonable cause exception
No penalty shall be imposed under this section with respect to any failure if it is shown that such failure is due to reasonable cause.