Which of the following would NOT typically require customs permission?

Personal belongings generally do not require customs permission when traveling across borders, as they are considered items that individuals bring for personal use. Customs regulations typically allow travelers to bring personal effects such as clothing, toiletries, and other day-to-day items without the need for explicit permissions or declarations, provided they fall within reasonable limits defined by customs laws.

In contrast, items such as firearms, cultural artifacts, and alcohol are subject to strict regulations and require appropriate permissions or declarations. Firearms often have stringent regulations regarding their importation, as they can pose safety and legal concerns; cultural artifacts may be protected under laws that govern heritage and preservation; and alcohol typically has limits on the quantity one can bring into a country, necessitating declarations to ensure compliance with tax and import regulations.