1. Professional musicians, professional disc jockeys, or professional sound or lighting technicians actively engaged in support of professional musicians or professional disc jockeys, eighteen years of age and older, to enter and to remain in any premises licensed under the provisions of RCW Title 66, but only during and in the course of their employment as musicians, disc jockeys, or sound or lighting technicians;

2. Persons eighteen years of age and older performing janitorial services to enter and remain on premises licensed under the provisions of RCW Title 66 when the premises are closed but only during and in the course of their performance of janitorial services; and

3. Employees of amusement device companies, which employees are eighteen years of age or older, to enter and to remain in any premises licensed under the provisions of RCW Title 66, but only during and in the course of their employment for the purpose of installing, maintaining, repairing, or removing an amusement device. For the purposes of this section “amusement device” means coin-operated video games, pinball machines, juke boxes, or other similar devices.