Final answer:
The Department of Health and Human Services must assign a child abuse case that is not high risk or of immediate threat within 72 hours of receiving the report.
Step-by-step explanation:
When a report indicates that a child has been abused and the situation is not classified as 'high risk' or there is no immediate threat to the child, the Department of Health and Human Services (DHS) has a specific time frame in which to assign the case. According to usual protocols and procedures for such situations, the case must be assigned within 72 hours from the receipt of the report. This timeline allows the authorities to assess and respond appropriately while ensuring that the child's welfare is given due attention, even in cases not considered high risk.