A house or other premises may be searched if there is a reason to believe that there is a person or item important for criminal proceedings inside such premises. House search may be performed only with an order issued by the presiding judge (in trial proceedings) or judge upon a petition of the public prosecutor (in pre-trial proceedings). In urgent cases the search may be ordered by a presiding judge or a judge of the court, in the jurisdiction of which the search is to be performed. The search itself is performed by the Police upon the order of the presiding judge or judge. As far as search of other premises and parcels is concerned, it is generally governed by the same rules as house search, however in this case the search may also be performed by the Police in urgent cases without the order of the presiding judge or judge, if it is not possible to secure the order in advance and the search cannot be delayed. However, the Police must request approval of the search by the competent authority immediately thereafter, in pre-trial proceedings through the public prosecutor. If such subsequent approval is not granted, the results of the search may not be used as evidence. The court order is also not required If the person using the premises or parcels consents with the search, in such case the Police will merely notify the presiding judge (in trial proceedings) or public prosecutor (in pre-trial proceedings). Legal assistance may be provided to a foreign authority only in relation to an act, which would be criminal also under the law of the Czech Republic.