Whoever willfully omits, neglects, or refuses to comply with any duty imposed upon him by this chapter, or to do, or cause to be done, any of the things required by this chapter, or does anything prohibited by this chapter, shall in addition to any other penalty provided in this title, be liable to a penalty of $1,000, to be recovered, with costs of suit, in a civil action, except where a penalty under subsection (b) or (c) or under section
6651 or
6653 or part II of subchapter A of chapter 68 may be collected from such person by assessment.