By the GBC
(To read them all: http://www.dandavats.com/wp-content/uploads6/GBCRES18.pdf)
Whereas GBC Resolution 310 of 2015 states:
Guru Related Research
[Statement] Based on the sacred siddhanta of guru-tattva, and with a positive and enthusiastic spirit, the GBC undertakes the responsibility to provide for present and future generations of devotees, a comprehensive and inclusive understanding that delineates how diksa- and siksa-gurus unitedly work within the framework of ISKCON.
In the meant