Opponents of the Bayer company's 67-km pipeline between its Dormagen and Krefeld chemical plants, carrying the highly poisonous and invisible carbon monoxide (CO) gas, have at the Higher Administrative Court in Münster criticized the pipeline approval process conducted in 2009 as including an insufficient number of participants.

The pipeline's opponents have accused the District Government in Düsseldorf of changing the original approval process of the pipeline by willfully excluding citizens affected by the pipeline from the deliberation. Representatives of the Düsseldorfer Court reject the charges.

The pipeline has been nearly complete since 2009. But residents of the area are fearful of the pipeline leaking and as a result no gas has been transported through it.

The District Government in Düsseldorf has already been able to book a small victory relating to the question whether the promulgated law on the pipeline by the North Rhine-Westphalian state parliament is consonant with Germany's Basic Law (Grundgesetz).  It was concluded by the Federal Constitutional Court that there was no breach of the Basic Law.