When are CCNs not required according to the guidelines?

The correct choice highlights that CCNs (Case Control Numbers) are not required for PD Forms 42 and internal investigations. This is significant because PD Forms 42 typically pertain to administrative or statistical reporting rather than incident-specific data, which is why the need for a case control number is waived in this context. Furthermore, internal investigations are often administrative proceedings that do not necessitate the formal tracking provided by CCNs. The absence of a CCN in these instances allows for a more streamlined approach to handling administrative matters without complicating them with the case-specific tracking that is usually reserved for incident reports or cases that require a formal investigation.

In contrast, the other options involve forms or contexts that generally require a CCN as they are related to specific incidents or cases where tracking and organization are necessary for record-keeping and accountability. This distinction is important in understanding the operational procedures regarding the issuance and utilization of forms within the police department.