(1) It is unlawful for any person to manufacture, distribute, or possess with intent to distribute, an imitation controlled substance. Any person who violates this subsection shall, upon conviction, be guilty of a class C felony.
(2) Any person eighteen years of age or over who violates subsection (1) of this section by distributing an imitation controlled substance to a person under eighteen years of age is guilty of a class B felony.
(3) It is unlawful for any person to cause to be placed in any newspaper, magazine, handbill, or other publication, or to post or distribute in any public place, any advertisement or solicitation offering for sale imitation controlled substances. Any person who violates this subsection is guilty of a class C felony.
(4) No civil or criminal liability shall be imposed by virtue of this chapter on any person registered under the Uniform Controlled Substances Act pursuant to RCW 69.50.301 or 69.50.303 who manufactures, distributes, or possesses an imitation controlled substance for use as a placebo or other use by a registered practitioner, as defined in RCW 69.50.101, in the course of professional practice or research.
(5) No prosecution under this chapter shall be dismissed solely by reason of the fact that the dosage units were contained in a bottle or other container with a label accurately describing the ingredients of the imitation controlled substance dosage units. The good faith of the defendant shall be an issue of fact for the trier of fact.