When must validations be submitted according to guidelines?

The correct choice states that validations must be submitted on the first Monday after the first Sunday of the month. This timing is significant because it aligns with standard reporting schedules that provide a structured approach for agencies to review and process data systematically. Submitting validations on this specific day ensures that all necessary checks and confirmations can be made after the weekend, allowing for any adjustments or corrections that may be needed before the month's data is finalized. This procedure supports accuracy and accountability in data reporting, which is crucial for maintaining the integrity of the information within the NCIC database and ensuring effective law enforcement communication.