There are four types of people exempt from the new face covering rule made mandatory in Scotland.
The public should wear face masks when in a shop or on public transport, with police able to issue fines of £60 to those flouting the rules.
Nicola Sturgeon announced the measure last month in a bid to stop the spread of coronavirus, with England set to follow suit next week.
The SNP leader said the use of facial coverings must not be used as an alternative to good hygiene in her change of policy.
However, there are four types of people who are currently exempt from this rule, with five reasonable excuses people can have if quizzed by police.
Here are the latest rules, according to the Scottish Government:
Who is exempt from wearing a face mask?
Children
Children under the age of five are currently not required to wear a face mask.
This means you don't have to cover up your toddler or baby if you are taking them on public transport or to the shops.
Children six years and older, however, should be wearing a mask.
There are plenty of smaller masks designed for children on the market, many with adjustable straps.
Police or paramedics
The Scottish government's advice is that police constables or workers - such as paramedics - acting in the course of their duty are exempt from wearing a mask.
Officers and staff who are in contact with someone who is suspected or confirmed to have coronavirus will wear a mask, according to Police Scotland.
Cops across Scotland have been given surgical face masks to wear as they respond to incidents or deal with the public where it is not possible to adhere to social distancing measures.
Drivers and checkout staff
Workers who are physically separated from passengers or customers are exempt from wearing face masks.
This means drivers, such as taxi drivers, who are separated by a screen in the car don't have to wear one.
Supermarket checkout staff separated from shoppers by perspex screens are also exempt.
Shop workers
Supermarket or shop workers are exempt from wearing a mask - but only if they can maintain a 2 metre distance from shoppers.
Many supermarkets have not made it compulsory for staff to wear masks, but have provided them if they choose to use one.
What is a reasonable excuse for not wearing face mask?
Health condition
If you have a health condition or are disabled and a face covering would cause difficulty, pain or severe distress or anxiety, you have a reasonable excuse not to wear one.
You are also exempt if your health condition means you cannot apply a covering and wear it in the proper manner safely and consistently.
Asthma sufferers are being warned not wear face masks during the coronavirus crisis.
Experts who warn that the pieces of protective equipment can make breathing harder for 12 per cent of Brits.
Individual discretion should be applied in considering the use of face coverings for children, including those with breathing difficulties or are disabled and would struggle to wear a face covering.
Eating or drinking
Removing your mask to eat or drink would be deemed a reasonable excuse.
However, you should ensure you are in a hygienic setting with clean hands before doing so.
Taking medication
You can remove your mask if you physically need to take medication.
Once again, this should be done safely while adhering to the correct hygiene rules.
Communicating
Talking to someone who is hard of hearing without a face mask is a reasonable excuse.
Those who rely on lip reading to communicate may need you to remove your mask when engaging in a conversation.
You are asked to remove it
You should remove your mask if a relevant person, such as a police officer, asks you to.
