Are Ten Codes used universally across all law enforcement agencies?

Ten Codes, also known as 10 Signals or Ten Signals, are a brevity code system used in voice communication, particularly among law enforcement and other emergency services. However, their use is not universal across all law enforcement agencies. Different regions, departments, or agencies may develop their own codes or may choose not to use them altogether, relying instead on plain language or alternative codes.

The variations in use can result from factors such as local policies, interoperability concerns, or the desire for clarity in communication, especially in multi-agency situations. While some agencies may adopt a version of the Ten Codes, it is not a standard practice across the board. Therefore, the statement that Ten Codes are used universally is inaccurate, supporting the conclusion that they are not universally adopted.