Abstract: The subject of the study is the implementation of prosecutorial supervision of the procedural activities of the preliminary investigation bodies. The authors consider problematic issues related to the regulation of the timing of approval by the prosecutor and the head of the investigative body of petitions to initiate investigative actions before the court that require a court decision; as well as the need for the participation of the prosecutor, investigator, inquirer when the court considers relevant petitions based on the legal regulation of this issue by the Criminal Procedure Code of the Russian Federation and departmental regulations. Particular attention is paid by the authors to the question of the expediency of returning to the prosecutor the authority to give written instructions to the investigator on the conduct of investigative and other procedural actions. The main conclusions of the study are: the need to fix the deadline for approval by the prosecutor and the head of the investigative body to initiate a petition before the court for investigative actions requiring a court decision, fixing this provision by means of appropriate instructions in the departmental acts of these officials, or by amending Article 165 of the Criminal Procedure Code of the Russian Federation. In addition, the authors note the mandatory participation of the prosecutor and the investigator in the consideration of the relevant petitions by the court, allowing the possibility of performing such a duty through video conferencing. A special contribution is the theoretical and practical justification of the expediency of returning to the prosecutor the right to give written instructions to the investigator on the conduct of investigative and other procedural actions