Final answer:
The specific category of inmate that must be constantly employed at hard labor, as per the Correction Law, is not mentioned in the given excerpts. Further research or consulting the Correction Law itself is necessary.
Step-by-step explanation:
According to the information provided, the question is about the category of inmate that must be constantly employed at hard labor, as per the Correction Law. Unfortunately, the specific category of inmate is not mentioned in the given excerpts. Therefore, without more information, a definitive answer cannot be determined. It would be necessary to refer to the Correction Law itself or additional sources that provide more details on the subject.