Any employer served with a citation or notice pursuant to Section 6317, or a notice of proposed penalty under this part, or any other person obligated to the employer as specified in subdivision (b) of Section 6319, may appeal to the appeals board within 15 working days from the receipt of such citation or such notice with respect to violations alleged by the division, abatement periods, amount of proposed penalties, and the reasonableness of the changes required by the division to abate the condition.