...a spokeswoman said on Thursday.
"We will announce tomorrow when it will be. It will have to be next week. We will say for sure tomorrow."
The European Commission has previously said it would rule on the emission plans of Poland, the Czech Republic and France by the end of March or beginning of April.
The plans are the cornerstone of the European Union's emissions trading scheme, the 27-country bloc's key tool for meeting commitments to reduce greenhouse gas emissions agreed under the Kyoto Protocol.
The Commission has so far demanded further cuts to 12 of the 14 carbon emissions plans it has ruled on for the second phase of the bloc's trading scheme, from 2008-12.