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Just because the below authorities wearing Techeiles are listed doesn’t mean we have contact info on all of them. This is for informational purposes only.
Hacham ben Haim is Rosh Yeshivah at RIETS and student of HaRav Ben Zion Abba Shaul. He also acts as Av Bet Din of Queens. It appears he ties like the Ben Ish Hai similar to R’ Mazuz.