PDFWAC 204-93-160
Driver's clothing.
The van driver must wear clothing that identifies the operator or primary sponsor.
(1) This must include:
(a) A legible name tag.
(b) Clothing maintained in a presentable and clean manner.
(2) Level III reflective vest and pants. The vest and pants must be approved as meeting the United States Department of Transportation (USDOT) or American National Standards Institution (ANSI) standards.
(3) An operator of an assistance van will not be allowed to display any sign, shield, marking, accessory or insignia on their uniform, clothing, or equipment to imply that he or she is a law enforcement officer, unless all of the following apply:
(a) The sign, shield, marking, accessory or insignia on their uniform or equipment is issued by a public law enforcement agency.
(b) The operator is employed by the public agency that is represented on the sign, shield, marking, accessory or insignia on their uniform or equipment, and approved to operate the vehicle by that agency under the authorized emergency vehicle permit.