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A European Commission decision in October to enlarge a previous 50-percent cap of Gazprom deliveries through the pipeline had been "suspended" by the Luxembourg-based court, PGNiG claimed Tuesday, DW reported.

The court itself did not issue a matching statement. PGNiG, 72-percent-owned by the Polish state, said the suspension ruling was issued on December 23, just before Christmas, requiring the commission to explain its decision in detail in response to Poland's complaint.

Read alsoLithuania Court rules Gazprom to pay EUR 36 mln fineOPAL (in German the Ostsee-Pipeline-Anbindungsleitung), completed in 2011, draws natural gas off the main "Nord Stream 1" pipeline lying on the Baltic seabed from Russia to Germany. 

From Greifswald on Germany's Baltic Sea coast, OPAL extends south 470 kilometers (290 miles) through eastern Germany to the Czech Republic.

The Nord Stream-Opal linkage skirts Baltic nations such as Lithuania and Poland.