What restriction applies to the carriage or length of the naturally short Boston Terrier tail?
Answer
It must not curl over the back
The tail is naturally short and set low, and while it can be straight, screwed, or kinked, it must not curl over the back.

Related Questions
What nickname is often given to the Boston Terrier due to its neat, black-and-white markings?Approximately what fraction of the total head length should the muzzle measure in an ideal Boston Terrier?Which weight range corresponds to the middle classification for the Boston Terrier according to general weight divisions?How is the shape of the Boston Terrier's head generally described when viewed from the front or top?What is the recognized color variant that appears black but shows a reddish tinge in bright sunlight?What physical trait associated with their flat face makes owners mindful of overheating?Which description accurately defines the eyes of the Boston Terrier?What restriction applies to the carriage or length of the naturally short Boston Terrier tail?What is generally required for grooming the Boston Terrier's short, smooth coat?What is the typical standing height range for a Boston Terrier at the shoulder?What characteristic defines the bite when viewing the muzzle structure of the Boston Terrier?