Police have "reminded" Nicola Sturgeon of her own mask rules after the First Minister was caught on camera without a face covering on the campaign trail.
Officers contacted Ms Sturgeon "to remind her of the importance of wearing a face covering when there is a legal requirement to do so", Police Scotland confirmed on Monday.
However, they said that they did not consider that any further action was required "given the circumstances of this incident."
Police Scotland justified not fining Ms Sturgeon by arguing this was "in line with our proportionate approach throughout the pandemic".
This has seen the force in the first instance ask Scots to observe Covid rules, rather than immediately resorting to fines or formal warnings.
In a statement, Ms Sturgeon said: "On Saturday, while campaigning outdoors in East Kilbride I was invited into a local barber shop. After a few seconds of being in the shop, I realised I had forgotten to put my face covering back on. I then immediately put it on.
"However, I accept that not wearing a face covering even for a few seconds was an error on my part and I am sorry for that.
"Having received complaints about the matter, Police Scotland made contact with me. This is what they would have done with anyone else in these circumstances, and they were absolutely right to treat me no differently to any other citizen.
"I explained that the error was inadvertent and the police have confirmed that the matter is closed."
The First Minister added: "While the law no longer requires face coverings to be worn, I will continue to do so in circumstances where this can help reduce the risk of infection, and I encourage everyone to do likewise."
Ms Sturgeon was reported to Police Scotland on Sunday for breaking her own mask laws, a breach that could result in a ￡60 fine, reduced to ￡30 if paid within 28 days.
Only hours before Saturday's visit to the barber shop in East Kilbride, the SNP issued a press release in which she urged Scots to vote for her party on May 5 "if you are as outraged as I am about the Prime Minister's contempt for the law."
Ms Sturgeon later posted her own footage on social media of the visit, which showed her wearing a tartan mask while shaving a man's beard. Photographers and camera crews were also present.
But separate footage then emerged showing her joking with others in the same barber shop with no face covering or physical distancing. Others around her were not bothering following her rules either.
Ms Sturgeon appears to approach the man filming her and strokes his head while mimicking the sound of an electric razor. Jane Lax, a former treasurer for Moray Conservatives, who is no longer connected to the party, made a police complaint.
Prof Jason Leitch repeated the SNP's claim that the First Minister had only neglected to wear a covering for a "matter of seconds" during a local election campaign stop at a barber shop.
Despite admitting he had not spoken directly to Ms Sturgeon about what happened, he said his understanding was that she had put on a mask when she realised the shop was "crowded."
He said her course of action was "actually what we’re asking people to do" rather than a breach of the Covid mask laws that were still in place during Saturday's visit. Ms Sturgeon finally lifted them on Monday.
But the Scottish Tories accused Prof Leitch of "misrepresenting the Covid laws as they stood" as face coverings were a legal requirement in shops whether they were crowded or not.
They also argued it was "inappropriate" for Prof Leitch as a civil servant to defend Ms Sturgeon's actions and accused him of "blurring the lines" between SNP ministers and their supposedly politically impartial government officials.
Stephen Kerr, the Scottish Tories' chief whip, said the intervention was the equivalent of Prof Chris Whitty being dispatched by the UK Government to defend Boris Johnson's Downing Street birthday party during lockdown.
Prof Leitch told BBC Radio Scotland: “My understanding of that incident – I haven’t spoken to the First Minister today, I imagine I’ll speak to her later – my understanding is it was a matter of seconds, she realises the place is crowded, puts her face covering on, which is actually what we’re asking people to do.
“The guidance says if you are in a crowded area, inadvertently or deliberately, then put a face covering on and that will protect you and others.”
He also justified her actions by admitting he had been guilty of momentary breaches of face mask laws, by forgetting to wear a mask while going to the toilet in a restaurant.
But Craig Hoy, a Scottish Tory MSP, said the national clinical director "should not be confusing the public, or doing the SNP's job for them, by trying to defend Nicola Sturgeon in this manner."
He said: "These kinds of questions should be left to politicians to answer. Instead, SNP ministers are in hiding and Jason Leitch is blurring the lines between ministers and government officials.
"Mr Leitch is also misrepresenting the Covid laws as they stood when Nicola Sturgeon clearly broke them at the weekend. Face mask use was still in law until today but Mr Leitch backed up Nicola Sturgeon's excuse that she only had to put the mask on when in a crowded space."
The SNP has said Ms Sturgeon was invited into the barber's shop from the street and put her mask on "within a few seconds" of her entering. Police Scotland have said they are assessing the complaint.
The First Minister previously admitted to breaking her mask rules in December 2020 when she was pictured without a covering at a funeral wake. She apologised and pledged she would not "drop my guard again."
She was also accused of double standards last month at the Duke of Edinburgh's memorial service at Westminster Abbey, where she also failed to wear a mask.
Although this was permitted in England, her rules at the time required worshippers in Scotland to wear face coverings.