When you are working within the Kali-yuga, you are working within the Ācārya system, where there is a Founder-Ācārya. So that person is the Paramahaṁsa because they know perfectly what to do in this age. And knowing what to do then everybody else follows them. Relevant instruction means, the Ācārya

What we are discussing here doesn't change the position or authority of GBC. This gives them the authority that they are supposed to have, that is given by the sampradāya, as well as it gives to the presidents their authority.

Do we have to rewrite Shakespeare because the language is its own language, it has its own grammar? So then here is going to be Prabhupāda's books.