Subject to subsection (b) of this section, in addition to any other grounds specified in this title for refusal, suspension, or revocation of a license, the Administration may refuse to grant a license under this title to any person and may suspend, revoke, or refuse to renew the license of any person if it finds that: The person has violated or is attempting to violate any provision of this title or any rule or regulation adopted under this title; The person has violated or is attempting to violate any of the other provisions of the Maryland Vehicle Law that relate to the business or activity of that person; or Any officer, manager, agent, or employee of the person has violated or is attempting to violate any provision of this title, any rule or regulation adopted under this title, or any of the other provisions of the Maryland Vehicle Law that relate to the business or activity of the person, unless the Administration is satisfied that the individuals engaged in the management of the business or activity: Had no knowledge of the wrongful conduct; or Were unable to prevent the violation or attempted violation. The Administration shall suspend the license of a person if it finds that the person violated § 15–606(f) of this title.