Just one fine has been issued by Lincolnshire Police for not wearing a face mask in shops since the rule was introduced.
Face coverings became compulsory in shops on July 24, with fines of up to £100 to enforce it.
So far just one person in the county was fined by police for not wearing a face mask.
It was a man in Boston who failed to wear face covering in a shop.
The man said that he forgot to bring one with him, and he also didn’t buy one from the shop he entered.
Lincolnshire Police warned people that wearing a face mask is “your responsibility” after questions arose over how the rule would be enforced.
The mandatory face masks guidance will be extended to more indoor venues this weekend, including libraries, cinemas and museums.
As previously, there is a set of exemptions for children and people with various conditions.
A recent study found that using disposable face masks rather than reusable ones could cost Lincolnshire around £144 million a year.