Requires the prosecuting attorney, in a prosecution for manufacturing, selling, delivering, or possessing with intent to manufacture, sell, or deliver a controlled substance listed in RCW 69.50.401, to file a special allegation of promoting a child predatory drug whenever sufficient admissible evidence exists, which, when considered with the most plausible, reasonably foreseeable defense that could be raised under the evidence, would justify a finding by a reasonable and objective fact finder that the controlled substance was flavored, colored, shaped, packaged, or otherwise altered in a way that was designed with the intent to make the controlled substance more appealing to a minor.