Nothing herein shall prevent the department from:

(1) Choosing not to pursue a civil penalty, license suspension or license revocation.

(2) Issuing a notice of correction in lieu of pursuing a civil penalty, license suspension or license revocation.

(3) Negotiating settlement(s) of cases on such terms and for such reasons as it deems appropriate. Prior violation(s) covered by a prior settlement agreement may be used by the department for the purpose of determining the appropriate penalty for subsequent violation(s).

(4) Referring violations or alleged violations to any federal, state or local government agency with jurisdiction over the activities in question including, but not limited to, the federal Drug Enforcement Administration (DEA) and the Washington state patrol (WSP).