French President Jacques Chirac and German Chancellor Angela Merkel are expected to discuss EADS funding when they meet on Tuesday.
The Franco-German company says the A350 program also depends on the achievement of cost-cutting targets announced in the wake of a second setback to production of the 555-seater A380, revealed earlier this year.
The superjumbo's overall two-year delay wiped 4.8 billion euros ($6.4 billion) off profit forecasts over four years and has forced Airbus to consider basing assembly work on new models at a single site, rather than splitting it among several countries.
Gallois, who has warned workers to expect job cuts, said a decision on the A350 final assembly would be announced early in 2007 along with other restructuring measures.
Also on Monday, Rolls-Royce PLC, the world's second-largest aircraft engine maker, said it has finalized an order with Airbus to supply its Trent engine for the A350 XWB. Financial details were not disclosed. The contract follows a preliminary agreement announced the Farnborough air show in July.
Shares of European Aeronautic Defence & Space Co. rose 1.2 percent to close at 23.15 euros ($30.89) in Paris.