EIO: this measure may be applied on the basis of the EIO under the condition that there is a prior agreement between the Polish Police/other LEA and the competent authority of the issuing Member State, which enables a Polish prosecutor to confirm such EIO issued by the Polish Police/other LEA, or to issue a decision on executing such EIO issued by the competent authority of another EU Member State.
Otherwise: conditions determined in the Art. 40 CISA, or in bilateral treaties.
When the cross-border observation has been conducted on the basis of the EIO, the results may be admitted as evidence in criminal proceedings. Option Otherwise the results of a cross-border observation cannot be directly used as evidence. They may be admitted as evidence before the court only upon the consent of the head of a certain law enforcement agency that gathered the materials (e.g. video or voice records, written notes). Also the officers conducting the observation (under certain conditions) may be called as witnesses before the court. Only a National Tax Administration may secure directly evidence during so-called “operational measures”, including the cross-border observation.