Lincolnshire County Council is reminding Lincoln City Council of its offer to care for and display Lincoln City's artefacts.
Ahead of the decision deadline of the 1 July, Cllr Martin Hill, leader of Lincolnshire County Council, explained:
"Together with the Usher Gallery Trust, we are keen to find a solution. We've been resourceful and responsive, and now we need to find a way forward which is right for our communities.
"We've said all along we're happy to look after Lincoln's Art and Museum Collections and the Usher Gallery building, but to do that we do need greater flexibility, so we can transform it like we have with Lincoln Castle, which gets far more visitors than it ever did before.
"We need to broaden the exhibits at the gallery – to provide what our public want.
"At the moment, we have about 20,000 visitors through the doors each year, which is disappointing. We need to do all we can to make it a more attractive offer – which we really want to do.
"We have a duty to do our best for our communities and we need to reach a sensible solution."
This was echoed at a meeting of the new Executive at the Council earlier today.
In the meantime, staff continue to prepare the city's artefacts ready to move to their new home in Nottinghamshire. This is scheduled to be by 1 October 2021.