Article 17. The Minister of Welfare or the governor of To, Do, Fu or prefecture may, when he deems it necessary for public health and sanitation, collect necessary reports from the poisonous or powerful agent dealers, or cause the competent officials to enter their plants, business places, shops or other places where poisonous or powerful agents are handled in the course of business and inspect books and other articles, question the persons concerned, or take away poisonous or powerful agents or other materials suspected of being poisonous or powerful, only in such minimum quantity as is necessary for testing.