Final answer:
The subject of this question is Law and it is discussing the process of expunction of files and its requirements.
Step-by-step explanation:
The subject of this question is Law. The question is discussing the process of expunction of files and the requirements for it to be done, including the physical destruction of data or sending of materials pursuant to a court order. The expunction of files must be done in compliance with certain regulations and may include records such as arrest and identification files.