Washington Revised Code Title 82. Excise Taxes § 82.86.060. Preemption

A city or county may not impose a tax, measured on a per line basis, on radio access lines, interconnected voice over internet protocol service lines, or switched access lines, for the purpose of ensuring the efficient and effective routing of calls made to the 988 crisis hotline to an appropriate crisis hotline center or crisis call center hub; or providing personnel or acute behavioral health, crisis outreach, or crisis stabilization services, as defined in RCW 71.24.025, associated with directly responding to the 988 crisis hotline.