What must all private investigators carry while on duty in Texas?

In Texas, private investigators are required to carry a valid private investigation license while they are on duty. This license serves as proof that they have met the necessary qualifications and have been issued the proper authorization to perform private investigation services. It ensures compliance with state regulations and fosters accountability in the profession.

The importance of this requirement lies in the regulatory framework established by the Texas Department of Public Safety, which oversees licensing for private investigators. Carrying the license while on duty verifies the investigator's legitimacy to clients, law enforcement, and the general public, thereby enhancing trust in their services.

The other options don't hold the same legal requirement or relevance to the professional conduct of private investigators. A firearm license is not mandatory for every investigator, and while some may choose to carry one for personal safety, it is not a universal requirement. An ID badge from the state is not stipulated as a necessity, and vehicle registration pertains to the legality of operating a vehicle rather than the work of a private investigator.