Section 134.63 - Nitrous oxide; restrictions on sales; records of certain sales; labeling(1) In this section: (a) "Deliver" or "delivery" means the actual, constructive or attempted transfer of nitrous oxide or a nitrous oxide container from one person to another.(b) "Nitrous oxide container" means any compressed gas container that contains food grade or pharmaceutical grade nitrous oxide as its principal ingredient.(2)(a) Except as provided in par. (b), no person who engages in the retail sale of cartridges of nitrous oxide may sell more than 24 cartridges in any single retail transaction.(am) Except as provided in par. (b), no person may, during any consecutive 48-hour period, engage in more than one retail purchase of nitrous oxide or any nitrous oxide container.(b) Paragraphs (a) and (am) do not apply to any of the following:1. A retail sale to a bakery, restaurant, institutional food distributor or other person engaged in the food service industry if the bakery, restaurant, distributor or other person has an emergency business need for the cartridges.2. Any retail sale to or retail purchase by a hospital, health care clinic or other health care organization that uses nitrous oxide to provide medical or dental care.3. A retail food establishment, as defined in s. 97.30(1) (c).(3)(a) Except as provided in sub. (5), every person in this state who delivers nitrous oxide or any nitrous oxide container to another shall keep a register of all deliveries of nitrous oxide or any nitrous oxide container. The register shall show the name and complete address of the person to whom the nitrous oxide or nitrous oxide container is delivered, the number of cartridges or other containers delivered and the date of delivery.(b) A person required to keep a register under par. (a) shall preserve the register on his or her business premises for 2 years in such a manner as to ensure permanency and accessibility for inspection and shall permit inspection of the register at all reasonable hours by state and local law enforcement agencies and by any state agency, as defined in s. 16.61(2) (d).(c) No person required to keep a register under par. (a) may deliver nitrous oxide or any nitrous oxide container to another person unless the person to whom the nitrous oxide or nitrous oxide container is delivered presents an official identification card, as defined in s. 125.085(1) (a) to (c).(d) No person to whom nitrous oxide or any nitrous oxide container is delivered may give a false name or address to a person required to keep a register under par. (a).(4)(a) Except as provided in sub. (5), no person may deliver a cartridge of nitrous oxide to another unless the cartridge bears a label, stamp or tag that sets forth in clearly legible and conspicuous form the following warning: "Nitrous oxide cartridges are to be used only for purposes of preparing food. Nitrous oxide cartridges may not be sold to persons under the age of 21. Do not inhale the contents of this cartridge. Misuse of nitrous oxide can be dangerous to your health."(b) Except as provided in sub. (5), no person may deliver a cartridge of nitrous oxide to another unless the packaging in which the cartridge is enclosed is marked with a label or other device that indicates the name and business address of the person delivering the cartridge of nitrous oxide.(5) Subsections (3) and (4) do not apply to a retail food establishment, as defined in s. 97.30(1) (c).1997 a. 336; 2007 a. 164.