The legislation passed by Flagstaff making it illegal to carry an open container of alcohol is referred to as:

The legislation passed by Flagstaff making it illegal to carry an open container of alcohol is referred to as an ordinance. An ordinance is a law adopted by a local government, such as a city or town, to govern matters not already covered by state or federal laws. These types of laws often address specific local issues, and in this case, it pertains to public safety and behavior concerning alcohol in an urban environment.

Ordinances typically have the authority to regulate things like zoning, noise levels, and public conduct, reflecting the interests and needs of the community. This differentiates them from statutes, which are laws enacted by state or federal legislatures, and from regulations, which are rules created by government agencies under the authority of statutes. Laws is a broader term that encompasses both statutes and ordinances, but specifying the term "ordinance" accurately reflects the nature of the specific legislation involved in regulating alcohol containers in a local context.