NYBD
Please explain what new denomination means. Im not sure who all the sources are but they don’t all have to do with the OU only 1 of them and these guys will be lucky if they reach a 1/100th of his knowledge in Torah in their lifetimes. They don’t have to like ou or eat its hechsher to recognize that he is a powerhouse in Halacha and one of the poskei hador. These guys are chutzpinyaks. Ok Im done ranting for now.
If you like you can Google the topic its on numerous sites. It is based on a Halacha in shulchan aruch choshen mishpat.