Is It Legal To Sell Old Ontario Licence Plates Legal For 16yr Old To Sell Cigarettes In Presence Of Adult Co-worker?

Legal for 16yr old to sell cigarettes in presence of adult co-worker? - is it legal to sell old ontario licence plates

My boss thinks that it is for our girls on Saturday in order to sell cigarettes to customers, provided that an adult workers between now and than .... Truth? (Law of the United Kingdom, over 18 years to sell cigarettes) or buy it.