(Decanter) - High level advisers to UNESCO have told Burgundy winemakers to improve their pitch to gain world heritage status for the region's vineyard climats, but Champagne remains on-track to secure a place on the list.

Burgundy has six weeks to improve its dossier before a final decision will be taken by the 39th session of the UNESCO World Heritage committee in Bonn, Germany.

Experts from the International Council on Monuments and Sites (ICOMOS) said in a report to UNESCO earlier this month that Burgundy must better explain the 'universal and exceptional value' of its myriad terrois, or climats, as well as improve 'the scope' of the proposal.

There appeared to be no such concerns for Champagne cellars and vineyards; experts agreed that the region's application warranted a place on the World Heritage list, although a final decision will not be made before the Bonn meeting in early July.

France's government backed both Burgundy and Champagne at the start of 2014.

Burgundy campaign leaders were optimistic this week. 'These specifications are normal,' said Aubert de Villaine, of Domaine de la Romanée Conti, and co-president of the region's world heritage committee along with Guillaume d’Angerville.

'Our project is ambitious and complex. We see climats as a whole, as a cultural project not just as monuments or buildings, which might be easier to gain heritage status. Climats are alive and culture at their very foundation'.

'We will answer the questions raised and improve the dossier in collaboration with French UNESCO ambassador, Philippe Lalliot, and the French government,' de Villaine told Decanter.com. 'I’m very confident.'.