The Referendum (Scotland) Bill Committee, which backed the general principles of the Bill setting up the poll, reported that it was "encouraged to hear" that the Holyrood and Westminster Governments were discussing what would happen in the wake of September 18 next year.
But both Governments confirmed yesterday that it was premature to talk of talks or discussions when officials were simply agreeing basic agreed facts about the timeline of events, and Westminster stood by its insistence that there would be no "pre-negotiation" ahead of the vote.
The MSPs are also urging Westminster to place its election rules on "purdah" on a statutory basis ahead of the poll. They were confident the Bill "should provide a suitable framework for next year's referendum".
But they pointed to an "asymmetry to the "purdah" arrangements which prevent governments from unveiling major new policies or funding in the period immediately before a vote.
MSPs heard concerns that these will not apply equally to the Scottish and UK Governments, with the Bill only regulating the Holyrood administration in this area.
Deputy First Minister Nicola Sturgeon has already stated there is "no reason to doubt the good faith of the UK Government's commitment to observe purdah restrictions equivalent to those imposed on the Scottish Government in the Bill".
The committee supported having a four-week period of purdah before the referendum on September 18 next year. They asked Holyrood to consider the anomaly that while purdah is due begin on August 21, the Scottish Parliament will not go into recess until two days later.
Convener Bruce Crawford welcomed the committee's backing of the Bill, saying: "The Electoral Commission told us it was 'a strong piece of legislation' able to deliver a referendum 'that truly puts the voter first'."