Officer may require dealers to declare stock:

Regulatory oversight and enforcement require flexibility to ensure compliance and prevent illicit activities. An officer's power to require dealers to declare stock must be broad enough to be effective. Therefore, the correct answer is anytime or periodically. This allows officers to conduct surprise checks based on intelligence or suspicion, as well as implement routine periodic declarations for ongoing monitoring. Limiting declarations to once a year, once in six months, or only during raids would severely restrict proactive enforcement, creating loopholes and opportunities for non-compliance between scheduled checks or in the absence of a full-scale raid.