All individuals licensed in accordance with chapter 18.43 RCW must utilize a seal/stamp that conforms to the design as authorized by the board. It is the responsibility of the licensee to maintain control over the use of his/her stamp/seal. The impression or image of the seal/stamp must conform to the below-illustrated design and be of a size that assures full legibility of the following required information:

(1) State of Washington;

(2) Registered professional engineer or registered professional land surveyor;

(3) Certificate number;

(4) Licensee's name as shown on wall certificate.