S.B. No. 1564 amends the Code of Criminal Procedure to include designated investigators of the municipal office of inspector general for the City of Dallas as peace officers. Specifically, it adds a new category under Article 2A.001, which states that an investigator commissioned by the Texas Commission on Law Enforcement and designated by the inspector general for the City of Dallas is recognized as a peace officer. Additionally, the bill modifies the definitions in Article 18B.001 to include this same investigator as an "authorized peace officer."

The bill also makes a deletion from the existing law, removing the previous designation of an investigator commissioned by the Texas Juvenile Justice Department as a peace officer under a specific section of the Human Resources Code. This legislative change aims to clarify the status of certain investigators and enhance the law enforcement capabilities within the City of Dallas. The act is set to take effect immediately upon receiving a two-thirds vote from both houses or on September 1, 2025, if that vote is not achieved.