(a) Per se. No person shall operate a motor vehicle while such person has .18 of one per centum or more by weight of alcohol in such person’s blood as shown by chemical analysis of such person’s blood, breath, urine or saliva made pursuant to the provisions of section eleven hundred ninety-four of this article.
(b) With a child. No person shall operate a motor vehicle in violation of subdivision two, three, four or four-a of this section while a child who is fifteen years of age or less is a passenger in such motor vehicle.