Final answer:
Rule 5.15 is about improperly displayed signals and the legal consequences associated with it.
Step-by-step explanation:
Rule 5.15 refers to the rule about improperly displayed signals.
It is a legal concept that deals with the display of signals, such as traffic signals or other signals that are used to communicate information or give warnings.
Whenever a signal is displayed in a way that does not comply with the legal requirements, it is considered to be improperly displayed, and it may lead to legal consequences.