(1) This chapter applies to brake friction materials designed for use on motor vehicles, as defined in RCW 46.04.320, that are subject to licensing requirements under RCW 46.16A.030.

(2) Some brake friction materials are exempted from this chapter by chapter 70.285 RCW. These include brake friction materials designed for use on:

(a) Motorcycles as defined in RCW 46.04.330;

(b) Motor vehicles employing internal-closed-oil-immersed motor vehicle brakes or similar brake systems that are fully contained and emit no debris or fluid under normal operating conditions;

(c) Military combat vehicles;

(d) Race cars, dual-sport vehicles, or track day vehicles, whose primary use is for off-road purposes and are permitted under RCW 46.16A.320;

(e) Collector vehicles, as defined in RCW 46.04.126; or

(f) Motor vehicle brakes designed primarily to hold motor vehicles stationary and not for use while motor vehicles are in motion.

(3) Some brake friction materials are exempt from certain requirements of this chapter. These include:

(a) Brake friction material manufactured prior to 2015 is exempt from WAC 173-901-050 (1) and (2), and 173-901-060. This exemption expires on January 1, 2025;

(b) Brake friction material manufactured prior to 2021 is exempt from WAC 173-901-050(2). This exemption expires on January 1, 2031;

(c) Brake friction material manufactured as part of an original equipment service contract for vehicles manufactured prior to January 1, 2015, is exempt from WAC 173-901-050 (1) and (2); and

(d) Brake friction material manufactured as part of an original equipment service contract for vehicles manufactured prior to January 1, 2021, is exempt from WAC 173-901-050(2).

(4) Friction materials that can be used on both exempted and nonexempted vehicles must comply with this chapter unless they are clearly labeled as designed for a specific use that is exempted from the requirements of chapter 70.285 RCW and this chapter.