In case of an EIO, no later than 30 days from the receipt of the EIO the competent authority has to take a decision for its recognition and execution. This term may be extended by not more than 30 days after indicating the reasons for the delay and after consultations between the competent authority and the issuing body. The competent authority for the execution of the EIO shall carry out actions for the investigation and other judicial investigation measures no later than 90 days from the date of its recognition. When it is not possible to observe the above terms, the competent authority shall immediately notify the issuing body of the reasons for the delay and after conducting consultations the necessary additional time for execution of an investigation measure and other judicial investigation measures shall be determined. When the issuing body has indicated in the EIO that due to the determined procedural terms, the gravity of the crime, or other especially urgent circumstances a shorter term is necessary or that investigative and judicial investigation measures must be carried out on a specific date, the competent authority for the execution of the EIO shall comply with this requirement as far as possible. When it is not possible to comply with the term or the specific date, the competent authority shall immediately notify the issuing body of the reasons and after conducting consultations the additional time necessary to execute an investigative measure and other judicial investigation measures shall be determined.
In case of a MLA request on the grounds of the EU MLA Convention 2000 or the CoE European Convention on Mutual Assistance in Criminal Matters a specific deadline is not envisaged. The practice shows that the fulfillment of requests usually takes between two and four months. The Republic of Bulgaria has declared that a summons on an accused person who is in its territory must be transmitted to the competent authorities no later than 50 days before the date set for that person's appearance - in case the confrontation includes interrogation of such person.