Which function is NOT authorized to peace officers under CPL section 2.20?

Under CPL section 2.20, peace officers have specific powers and responsibilities, but issuing civil penalties is not one of their authorized functions. This section primarily focuses on law enforcement duties, such as maintaining public safety, conducting arrests, and carrying out warranted searches. The option involving civil penalties typically pertains to regulatory agencies rather than law enforcement officers, as such actions require a different legal framework and authority.

In contrast, carrying out warrant searches, issuing navigational summons, and taking custody of firearms are functions that peace officers are empowered to perform. These duties directly relate to their role in enforcing the law and ensuring public safety. For example, warrant searches are critical for justice and law enforcement, navigating summons involve enforcement of regulations on waterways, and handling firearms is essential for public safety during certain enforcement scenarios. Therefore, the focus under CPL section 2.20 is on criminal law enforcement rather than civil matters, making the function of issuing civil penalties not authorized for peace officers.