What are the essential markings required on each item or its proximal container?

The correct answer encompasses the essential markings that ensure proper identification and tracking of evidence in an investigative context. Each item or its proximal container must clearly display the item number to uniquely identify it within a case. A case number is necessary to associate the evidence with the specific investigation, thus maintaining its integrity and providing a clear reference point for legal proceedings. The collector's ID is important because it attributes the responsibility for collecting the evidence to a specific individual, which is crucial for accountability and chain of custody. The date collected is vital for establishing the timeline of the evidence relative to the crime, as well as for maintaining accurate records. Lastly, a description of the item offers additional contextual details that can clarify its importance and relevance to the case.

This combination of markings is fundamental for maintaining the chain of custody and ensuring that the evidence is admissible and reliable in legal contexts. The other sets of markings mentioned do not provide the same level of specificity and operational utility required for evidence tracking and legal authentication.