What term describes a set of rules outlining required or appropriate clothing?

The term "Dress Code" refers to a specific set of guidelines or rules that dictate what clothing is acceptable or required in particular settings, such as schools, workplaces, or events. These codes may include stipulations about appropriate colors, styles, and types of clothing to promote a certain image or to ensure comfort and safety. Understanding this term is crucial as it emphasizes the social standards and expectations surrounding clothing choices in various environments.

In contrast, "Fashion" generally pertains to the prevailing styles and trends in clothing at a given time, while "Style" relates more to an individual's unique way of expressing themselves through clothing and accessories. "Clothing Inventory" typically refers to a systematic catalog of clothing items a person or organization possesses, rather than rules governing what should be worn. Therefore, "Dress Code" is the most fitting term for describing a structured set of clothing guidelines.