The ICC or International Code Council is a nonprofit organization that works directly with the government to “support the adoption and use of the highest quality codes, standards, products and services of ICC.” ICC website 2019.
Link: https://www.iccsafe.org/about/who-we-are/
The ICC Evaluation Service performs the evaluation and testing of products, such as engineered flood vents. The tests performed by the ICC Evaluation service ensure products are to code compliance.