Wash. Rev. Code § 47.68.230
It shall be unlawful for any person to operate or cause or authorize to be operated any civil aircraft within this state unless such aircraft has an appropriate effective certificate, permit, or license issued by the United States, if such certificate, permit, or license is required by the United States, and a current registration certificate issued by the secretary of transportation, if registration of the aircraft with the department of transportation is required by this chapter. It shall be unlawful for any person to engage in aeronautics as an airman or airwoman in the state unless the person has an appropriate effective airman or airwoman certificate, permit, rating, or license issued by the United States authorizing him or her to engage in the particular class of aeronautics in which he or she is engaged, if such certificate, permit, rating, or license is required by the United States.
Where a certificate, permit, rating, or license is required for an airman or airwoman by the United States, it shall be kept in his or her personal possession when he or she is operating within the state. Where a certificate, permit, or license is required by the United States or by this chapter for an aircraft, it shall be carried in the aircraft at all times while the aircraft is operating in the state and shall be conspicuously posted in the aircraft where it may be readily seen by passengers or inspectors. Such certificates shall be presented for inspection upon the demand of any peace officer, or any other officer of the state or of a municipality or member, official, or employee of the department of transportation authorized pursuant to this chapter to enforce the aeronautics laws, or any official, manager, or person in charge of any airport, or upon the reasonable request of any person.
RCW 47.68.230
Effective date-2005 c 341: "This act is necessary for the immediate preservation of the public peace, health, or safety, or support of the state government and its existing public institutions, and takes effect July 1, 2005." [ 2005 c 341 s 6.]