Section 90.56.540 - Operation of a vessel while under influence of liquor or drugs-Penalty(1) A person is guilty of operating a vessel while under the influence of intoxicating liquor or drugs if the person operates a covered vessel within this state while: (a) The person has 0.06 grams or more of alcohol per two hundred ten liters of breath, as shown by analysis of the person's breath made under RCW 90.56.550; or(b) The person has 0.06 percent or more by weight of alcohol in the person's blood as shown by analysis of the person's blood made under RCW 90.56.550; or(c) The person is under the influence of or affected by intoxicating liquor or drugs; or(d) The person is under the combined influence of or affected by intoxicating liquor or drugs.(2) The fact that any person charged with a violation of this section is or has been entitled to use such drug under the laws of this state shall not constitute a defense against any charge of violating this section.(3) Operating a vessel while intoxicated is a class C felony under chapter 9A.20 RCW.2000 c 69 § 23; 1991 c 200 § 605. Formerly RCW 88.16.220.Effective dates-1991 c 200: See RCW 90.56.901.