Which codes indicate "different" unless used for specific traffic?

The choice of codes that indicate "different" unless used for specific traffic is primarily represented by the codes 905, 998, and 999. These codes are typically utilized within law enforcement communication to convey specific situations or alerts that may deviate from standard protocols or signals.

The 905 code is often associated with providing information about an emergency situation, and it varies based on local jurisdiction usage. Meanwhile, codes 998 and 999 are frequently used to denote critical incidents, such as officer-involved shootings or other urgent emergencies requiring immediate assistance. These codes indicate that a standard protocol is in place for such events, allowing officers on duty to quickly understand the nature of the event being communicated.

In contrast, the other options consist of codes that are generally used for more routine or specific law enforcement situations, which do not convey the broad and flexible meaning of "different" in the same way as the codes from the correct choice. Therefore, the selection of 905, 998, and 999 aligns with the intended functionality of indicating that a situation is outside of the norm, thus reinforcing why this is the correct choice.