The elections watchdog is to reveal its verdict on the question the Scottish Government wants to ask voters in next year's independence referendum.
The Electoral Commission will publish its long-awaited assessment of the SNP administration's preferred question - Do you agree that Scotland should be an independent country?
The commission will also publish its advice on spending limits for the referendum campaign.
Scotland's Deputy First Minister, Nicola Sturgeon, has said the Scottish Parliament has the final say on such matters, but on Tuesday she told MSPs that "considerable weight" would be attached to the commission's views.
"As with referendums held under UK legislation, it is for the Government to propose the referendum question, the Electoral Commission to test the question and the Parliament to make a final decision," Ms Sturgeon said. "The Scottish Government will consider the wording of the question, and indeed other matters relating to the conduct of the referendum, in light of the commission's advice and, of course, the Scottish Parliament will have the final say during its scrutiny of the referendum legislation."
She said she has "made very clear the considerable weight that will be attached to the Electoral Commission recommendations by the Scottish Government".
Ms Sturgeon said: "There would have to be a very good reason to depart from Electoral Commission recommendations, and any government so doing would have to explain its position to this Parliament."
Scottish Labour has challenged the Scottish National Party administration to accept the commission's recommendation's in full.
Patricia Ferguson, Labour spokeswoman on the constitution at Holyrood, argued: "For this referendum to be carried out in a fair and proper manner and, as importantly, to be seen to be carried out in a fair and proper manner, the recommendations of the Electoral Commission must be the guiding principles for the conduct of the referendum, both in terms of the question to be put and the spending limits to be applied."
In its referendum consultation, the Scottish Government proposed spending limits of £750,000 for campaign organisations Yes Scotland which is pro-independence and Better Together which wants to keep Scotland in the UK. It also proposed that political parties represented in the Scottish Parliament can spend a maximum of £250,000. But the spending limits would only apply to the four months before the independence vote next autumn.