RCW 82.08.02569: Exemptions—Sales of tangible personal property related to a building or structure that is an integral part of a laser interferometer gravitational wave observatory.

The tax levied by RCW 82.08.020 shall not apply to sales of tangible personal property to a consumer as defined in RCW 82.04.190(6) if the tangible personal property is incorporated into, installed in, or attached to a building or other structure that is an integral part of a laser interferometer gravitational wave observatory on which construction is commenced before December 1, 1996.