Which agency is NOT mentioned as a credited testing laboratory for firestop products?

The International Code Council (ICC) is primarily known for developing and publishing model codes and standards for the building industry, rather than functioning as a testing laboratory for firestop products. It plays a crucial role in establishing safety regulations and codes which builders and manufacturers may need to follow, but it does not perform the testing necessary to qualify products for firestop applications.

Underwriters Laboratories of Canada, Omega Point Laboratories, and Internet Testing Services are recognized as accredited testing laboratories, meaning they have the capability to conduct testing and evaluation of firestop products to ensure compliance with relevant standards. These organizations are specifically geared towards testing and certifying various building materials and systems, making them distinct from the ICC's role in code development and adoption.