Our attorneys Kamilla Pomorska and Anna Celejewska-Rajchert successfully represented a client in judicial proceedings before the Supreme Administrative Court in a case on the merits of limiting the right of access to the case file in th3e proceedings before the President of the Railway Transport Office, due to the trade secret. The opposing party – an association of competing entrepreneurs demanded access to the whole file. The essence of the dispute concerned the decision whether, despite the lack of clear regulations in the Act on railway transport, the information constitutes a trade secret, submitted by a party in the proceedings before the President of RTO. The Supreme Administrative Court upheld our position, stating that it is permissible to restrict the right of access to the case file in the proceedings before the President of RTO because of the information constitutes a trade secret. In court summary Supreme Administrative Court pointed out that the correct legal basis are the provisions of the Constitution (in particular Art. 61), Art. 11 paragraph. 4 of the Act on combating unfair competition and art. 74 of the Administrative Proceedings Code in conjunction with Article. 14 paragraph. 4 of the Act on railway transport. The case sets a precedent and will have great importance for the practice of proceedings by the President of UTK as well as in the course of proceedings before other market regulators where regulations do not explicitly provide for the proper procedures to protect information submitted by the Party constitutes a trade secret.