No person shall engage in the activity of selling, distributing, or otherwise circulating any magazine, periodical, pamphlet, handbill, book, or other form of literary material, or of canvassing or soliciting orders or subscriptions therefor within the city, without first applying for and securing a registration certificate as provided in this chapter, provided this section shall not apply to the sale of newspapers.
('75 Code, § 64.1) Penalty, see § 113.99