For MLA according 1959 Convention: Section 848 of Criminal Procedure Law - Deciding of a Request of a Foreign State (1) A request of a foreign state regarding the provision of assistance in the performance of a procedural action shall be decided immediately, but not later than within 10 days after receipt thereof. If additional information is necessary for deciding of a request, such information shall be requested from the state that submitted the request.
For EIO: (1) A competent authority of Latvia shall take a decision to recognise and execute a European Investigation Order as soon as possible, however not later than within 30 days after receipt of the European Investigation Order. Where translation of the documents is required, the decision shall be taken as soon as possible, however not later than within 30 days from the day of receipt of the translation.