In what situations can CS be used according to the guidelines?

The use of CS (tear gas) is typically governed by guidelines that aim to control public order disturbances while maintaining officer and civilian safety. In the context of riots and civil disobedience, CS can be employed as a non-lethal option to disperse crowds and prevent escalation into violent confrontations. This situation often involves large groups of individuals who may be engaging in unlawful behavior, and the use of CS serves to restore order and allow law enforcement to regain control over the situation.

In contrast, the other situations listed do not align with standard guidelines for using CS. Traffic stops and hijackings involve different tactical approaches that prioritize immediate officer safety and vehicle control rather than crowd dispersal. Home invasions and robberies typically focus on arresting suspects rather than using crowd control measures, and emergency response and first aid do not involve the use of CS, which is designed primarily for crowd control rather than medical scenarios.