First of all, I think that being a deputy chief priest means that there is a chief priest.
As you know, the Soto sect has a way of thinking that oral tradition is also important, and the Garan Dharma handed down in temples is also important.
Frankly speaking, I think it's a good idea to ask the chief priest.
When there are circumstances such as illness, etc., and it doesn't come true, wouldn't it be a good idea to have a nearby reliable chief priest tell you while doing research with “Onkochiyo = Motoyama Chiku Dormitory)” etc. ❓
There are not only sutras, but also manners, so it may be difficult to accurately convey them by email or phone.