The Polish government hasn't ruled out support for Adam Opel GmbH operations following the company's sale by General Motors Co., but the aid will depend on the future owner's decisions regarding Opel's Polish production plant, the Polish economy ministry said Friday.

In a statement, the ministry said continued support would depend on what happens to the Gliwice, Poland, plant in New Opel's final restructuring plan.

"It [the restructuring plan] foresees 100% use of production capacities, the relaunch of the third shift, and output at 215,000 cars a year, the highest in the plant's history," the ministry added.

Any aid would have to comply with European Union rules, the ministry said.

General Motors and Austrian-Canadian auto parts maker Magna International Inc. (MGA) might make a final decision on the planned sale of GM's Opel and Vauxhall brand in the middle of next week, two people familiar with the matter told Dow Jones Newswires Friday.

-By Marcin Sobczyk, Dow Jones Newswires; +4822 447-2432; marcin.sobczyk@dowjones.com