Douglas Ross has announced the Scottish Conservatives will not take part in any referendum that is not legally binding.
During her independence speech to Holyrood Nicola Sturgeon announced that the Lord Advocate Dorothy Bain, the Scottish Government's most senior law officer, had agreed to refer the matter of "legal clarity" to the UK Supreme Court.
The First Minister stated: "The Lord Advocate has agreed to make a reference of the provisions in the Bill to the Supreme Court."