(a) If the contributions are unpaid after 30 days from the date of mailing or personal delivery of a written demand for payment, the department may assess and collect in the same manner as contributions a penalty equal to the greater of 10 percent of the contributions due or $10.
(b) This penalty does not attach if within 30 days after mailing or personal delivery of the demand, arrangements for payments are made with the department, and payment is made in accordance with the arrangements.
(c) Penalties collected under this section shall periodically be transferred from the clearing account to the training and building fund.