Jason Leitch has put the ball in Nicola Sturgeon 's court over vaccine passports for sports stadia.
The national clinical director insists the Scottish Government will be provided with medical advice on the controversial certification system but whether they become a reality will be a "political decision".
England's FA Cup Final is expected to trial a scheme which requires proof of vaccination or a recent negative test, a month before 12,500 fans are set to return to Hampden for Scotland's Euro 2020 opener against Czech Republic.
Leitch believes such a scheme is more likely for international travel as he railed against a "vaccine for going to the pub" scenario.
But he admits any decision on what, if anything, will be required to return fans to sporting events in the future rests with Holyrood.
He told BBC's Off the Ball: "That debate is playing out in media circles, political circles and clinical advice circles.
"I think where this will end up is political decision-making.
"We will give advice on vaccine certification, although I prefer Covid certification because it would have to include tests - 'yes or no' and when you had it. Have you got antibodies from previous infection? Have you been vaccinated? When was it? How long ago was it? Was it a World Health Organisation-recognised vaccine?
"It gets quite complicated quite quickly.
"I think we will almost certainly have some version of it for international travel.
"You can see that happening already - you can't fly to Israel without vaccination, Qantas are saying they will require vaccination.
"Domestic vaccine certificates? I think that's much more difficult.
"There are some trials and tests and that seems to be the right way to go. There's talk about Covid certification for the World Snooker Final, the FA Cup Final and we will use those as a four country basis for thinking - can this work? Can that bit work?
"I don't think it's yes or no that vaccination gets you into the pub. I don't think that's where we're heading.
"But there will be some kind of complexity."
