(1) Except for the pesticide dealer license required under RCW 15-58-180, all pesticide licenses shall expire on the December 31st following their issuance:

(2) Pesticide renewal applications for licenses issued under the authority of chapter 17.21 RCW shall be filed on or before January 1st of the appropriate year.

(3) If an application for renewal of any pesticide license issued under the authority of chapter 17.21 RCW is not filed on or prior to January 1st following the expiration date of the license, a penalty shall be assessed as provided in RCW 17.21.140 and added to the original fee, and shall be paid by the applicant before the renewal license is issued.

(4) If an application for renewal of a pesticide dealer license issued under the authority of chapter 15.58 RCW is not filed on or before the master license expiration date, the master license delinquency fee shall be assessed under chapter 19.02 RCW and shall be paid by the applicant before the renewal license is issued.

(5) If an application for renewal of any license issued under the authority of chapter 15.58 RCW, other than the pesticide dealer license, is not filed on or before the expiration date of the license, penalty equivalent to the license fee shall be assessed and added to the original fee, and shall be paid by the applicant before the renewal license is issued.

(6) Nothing herein shall be construed to limit the department's ability, as otherwise provided by law, to deny a license, to condition license renewal, or to enforce violations of applicable laws, subsequent to the expiration of a license.