The ‘non bis in idem’ rule applies in Union law (see, among the many precedents, the judgment of 5 May 1966, Joined Cases 18/65 and 35/65 Gutmann v Commission [1966] ECR 149 and a recent case, the decision of the Court of First Instance of 20 April 1999, Joined Cases T-305/94 and others Limburgse Vinyl Maatschappij NV v Commission [1999] ECR II-931).
Tá feidhm ag riail an ‘non bis in idem’ maidir le dlí an Aontais (féach, i measc na raidhse fasach, breithiúnas an 5 Bealtaine 1996, Cásanna Ceangailte 18/65 agus 35/65, Gutmann v. Coimisiún [1966] ECR 149 agus cás a bhí ann le déanaí, breith ón gCúirt Chéadchéime an 20 Aibreán 1999, Cásanna Ceangailte T305/94 agus eile, Limburgse Vinyl Maatschappij NV v. Coimisiún [1999] ECR II-931).