Scotland's new vaccine passport system will not be enforced until more than two weeks after it is introduced.
People going to nightclubs and many other large events will need proof they have had two doses of vaccine from Friday.
But First Minister Nicola Sturgeon said there would now be a "grace period" until October 18.
It means there will be no enforcement action against businesses who do not comply with the rules before that date.
Ms Sturgeon said the delay would allow businesses to "test, adapt and build confidence in the practical arrangements they will need to put in place to be compliant with the scheme".
Many businesses which will be affected by the controversial scheme have complained of a lack of detail from the government about how it will work in practice.
The Scottish Conservatives are pressing for a vote at Holyrood on Wednesday on whether it should should go ahead.
From Friday, people over the age of 18 will need to show that they have had both doses of the vaccine before they are allowed entry to certain venues and events.
They are:
- Nightclubs and adults entertainment venues;
- Unseated indoor events with more than 500 people, even if some are seated;
- Unseated outdoor events with more than 4,000 people;
- Any event with more than 10,000 people in attendance.
Regulations are being drawn up which will place a legal obligation on venues to check the vaccine certificates of customers, with the system working mainly via mobile phone apps.
Clubs and smaller events will have to check everyone present, while organisers of larger events such as major football matches will be allowed to do spot checks of a "reasonable" number of customers.