“Rosh Yeshiva of BMG, HaRav HaGaon RKBH Aaron Kotler Shlitah.”
R’ Aaron Kotler is not the Rosh Yeshiva.
What does RKBH stand for?
Rosh Kol Benei HaGolah. He is the head of the largest Yeshiva in Chutz L’Aretz.
And he is the Rosh Yeshiva. Says so on all the documents. Rav Aaron Kotler, CEO. CEO (in America) means he is in charge, no matter who gives or doesn’t give shiur.