Great Baikal Trail from Listvyanka to Bol'shiye Koty

It says on the Great Baikal Trail's website that a permit is necessary to take the hike from Listvyanka to Bol'shiye Koty.

However, I have not been able to find the following details on the website:

• When is their Listvyanka office open? (in case my email to them isn't processed)
• Is there a possibility that the permit won't be granted? Are there any requirements or general things to know? (not for the hike itself, but for the permit)