Councillors will have to decide who should run a West Yorkshire council.
But it’s not known if the party with the most number of councillors will take control of Calderdale Council.
Labour were ousted last year when the Conservatives, backed by the Liberal Democrat and independent vote, took control of the authority.
At the time the Conservatives cited Labour’s determination to press ahead with unpopular decisions as a reason and opposition councillors united for a vote of no confidence in Labour.
May’s local elections left the authority with no overall control, with Labour having 24 councillors; 21 Conservatives; five Lib Dems and one independent.
Clr Tim Swift, Labour, leader, has promised major changes if he is elected leader this week.
He says that although no party has an overall majority following this year’s elections, Labour remain the largest party and “would expect to form the next administration – unless the Liberal Democrats vote to put the Conservatives back into power”.
He is proposing an all-party investment committee which will make recommendations to Cabinet and Council on major economic and capital investments.
The committee, expected to meet in public, will bring into the open proposals involving tens of millions of pounds of investment in Calderdale.
Clr Swift said: “At the moment, these discussions take place in closed sessions of the Economic Task Force and the Capital Programme working party – or in private briefings involving the Leader and senior officers.
“We need to join up these discussions, and bring them into the open and that’s what this proposal will do.
“I am also proposing that we put in place new conventions so there is a clear agreement that wherever possible there will be cross-party representation on working parties and boards – and to guarantee that more information is shared with all councillors.
“The Cabinet system can provide clear leadership for the council, but it has an in-built tendency to secrecy which is unhelpful. I believe we need to change that.
“For the past nine months, Calderdale has suffered from a Conservative leadership that lacks imagination, has no sense of direction, and has already lost it’s grip on major problem areas such as highways and asset management.
“We’re setting out a better way to take Calderdale forward, and we hope that other members will support and share this vision.”
The other parties have yet to comment on the plans, although Calderdale Lib Dem Clr James Baker on Twitter responded to a comment that Labour should be looking to the Lib Dems to run the council, by saying: "We aren't doing any deals with any other party, we are focusing on our own values."
A leader will be elected at Full Council on Wednesday.
