The Scottish Government has revealed further details of the sweeping travel restrictions that take force from Friday.
It means those living north of the Border must have a "reasonable excuse" for visiting England, and vice versa.
Nicola Sturgeon has insisted the tough new rules are necessary to drive down the spread of coronavirus ahead of the festive season.
Scots living under level four of lockdown from tomorrow are expected to remain within their council areas unless they have to leave under exceptional circumstances.
But those living in border communities have raised concerns about the need to cross into England for work and education.
Ministers have now shared a draft list of "reasonable excuses" for crossing south of the Border.
Scots are allowed to cross the border if their work requires it - for example, someone living in Langholm who works in Carlisle, or delivery drivers who routinely travel between Scotland and England.
The same applies for school and higher education.
But the Scottish Conservatives today questioned whether border restrictions are within legal Holyrood's power.
MSP Adam Tomkins said: “There are serious legal questions to be asked about the draft regulations published by the Scottish Government, which include rules about who may “enter or remain in” Scotland.
"These rules appear to affect British and Irish citizens across the UK and Ireland.
“Is this within Holyrood’s competence? For one thing, freedom of movement would appear to be expressly reserved to the UK Parliament under the Scotland Act."
Examples of "reasonable excuses" for crossing the border include:
- Obtaining or providing food / medical supplies for those in the same household or for vulnerable people
- Obtaining essential supplies for the upkeep or maintenance of a household, or the household of a vulnerable person
- Providing or receiving childcare, education, or training
- Undertaking driver tuition or driving tests
- Attending a usual place of worship
- Visiting someone in prison
- Providing or obtaining medical assistance
- Participating in shared parenting agreements
- Activities associated with moving house
- Attending a marriage or funeral service
- Accessing veterinary services
