apaddy is correct. The reason I said 'by country' is that countries have different ideas about 'safety'! Every rule is made for safety, even when two countries have equal and opposite rules.
It's like some public galleries and museums will not allow you to take carrier bags and shopping bags into the halls - in case you leave a bomb behind. They make you store them in their left luggage facility, for everyone's safety.
Some
other public galleries and museums will not store your carrier bags and shopping bags in their left luggage facility - in case you leave a bomb behind, for everyone's safety.
