(a) Any person who fails to pay any assessment within 30 days of the due date shall pay, in addition to his or her assessment fee, a penalty of 10 percent of the amount of the assessment determined to be past due and, in addition, interest on the unpaid balance at the rate of 1.5 percent per month.
(b) In addition to any other penalty imposed, the commission may require any person who fails to pay any assessment or related charge pursuant to this article to furnish and maintain a surety bond in a form and amount and for a period of time specified by the commission as assurance that all payments to the commission will be made when due.