Del. Code tit. 14 § 8517
The Department may, upon its own motion, and shall, upon the verified complaint in writing of any person setting forth facts which, if proved, would constitute grounds for refusal or revocation under this chapter, investigate the actions of any applicant or any person or persons holding or claiming to hold a certificate or permit.
However, before proceeding to a hearing on the question of whether a certificate of approval shall be refused or revoked for any cause enumerated in § 8516 of this title, exclusive of those causes enumerated in paragraphs (3) and (4) of that section, the Department may grant a reasonable time to the holder of or applicant for a certificate of approval to correct the situation. If within such time, the situation is corrected, no further action leading to refusal or revocation shall be taken.
14 Del. C. § 8517