Michael O'Reilly pharmacist Joe Madden said the rules can be a little tricky at times, even for him.

"There's been a bit of confusion about who needs to be wearing them and there's been a bit of anxiety, and even from time to time some resistance," Mr Madden said.

"I still find myself forgetting my mask. It's something that takes some getting used to. It's tricky, it's hard, but we're all in this together."

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The Public Health Orders state that masks must be worn in all non-residential indoor areas, including shops, workplaces, businesses, and venues.

Masks do not need to be worn outdoors, however they do need to be worn for "outdoor gatherings" such as an open-air event or sporting match.

Masks can be removed under certain circumstances, including when eating or drinking, when trying to communicate with someone hard of hearing, or when doing strenuous exercise by oneself.

People need not wear a mask if they have health problems, disabilities, or mental illnesses that prevent them from doing so.

The NSW Government "encourages" such people to get a letter from their doctor or disability provider to prove their exemption status, however it is not mandatory to do so.

The government urges citizens to "be respectful" of such people, since it is not always obvious why they are unable to wear a mask.

Drivers are not required to wear a mask in their cars, however they are required to wear a mask if one of their passengers is from a different household.

Office workers can remove their masks provided they are the only one in the office, however they must put one on if another person arrives.

Masks must be worn over both the mouth as well as the nose, and most masks will have a metal strip that can be contoured to fit securely around the bridge of the nose.

Masks are not necessary when visiting somebody else's house, however NSW Health "strongly recommends" mask usage in cramped settings where physical distancing is impossible.

Masks are not necessary for children under 12, and must never be put on children under the age of two.

More detail can be found on the NSW Government website.

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