The bill amends Chapter 270 of the General Laws by adding a new section, Section 18A, which regulates the sale and distribution of nitrous oxide products. It defines key terms such as "authorized seller," "nitrous oxide product," and "retail establishment," and establishes that only authorized sellers—such as culinary, medical, dental, automotive, and industrial suppliers—are permitted to sell nitrous oxide. The bill prohibits the sale or distribution of nitrous oxide for human inhalation or intoxication purposes and restricts sales to individuals aged 21 and older, requiring valid government-issued photo identification for purchase.

Additionally, the bill mandates that nitrous oxide products must not be openly displayed and should only be provided upon direct request, kept behind the counter or in non-public storage. Authorized sellers are required to post a warning sign about the legal restrictions on sales to individuals under 21 and the dangers of recreational inhalation. The bill also outlines exceptions for nitrous oxide used in food products and for medical or dental purposes administered by licensed practitioners. Violations of this section can result in fines escalating from $1,000 for a first offense to $5,000 for third and subsequent offenses, with each day of continued violation considered a separate offense.