(a) Where the licensee or permittee requests a hearing in accordance with §§ 771.59 and 771.60, a written response to the relevant notice may be filed with the administrative law judge and served on the Director of Industry Operations within 15 days after the licensee or permittee receives service of the designation of the administrative law judge.(b) Where no hearing is requested, the licensee or permittee may file a written answer to the relevant notice with the Director of Industry Operations within 15 days after service of the notice.(c) An answer shall contain a concise statement of the facts that constitute the grounds for defense. A hearing, if requested, may be limited to the issues contained in the notice and the answer. The administrative law judge or Director of Industry Operations, as the case may be, may, as a matter of discretion, waive any requirement of this section.(d) Answers need not be filed in initial application proceedings.