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 these investigators as "authorized peace officers."

The bill also makes a deletion in the existing law by removing the previous designation of an investigator commissioned by the Texas Juvenile Justice Department under Section 221.011, Human Resources Code, from the list of peace officers. 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 such a vote is not achieved.