This is what is announced by Lykke Wallet as their August 1st plan : https://www.lykke.com/company/news/Lykke-Policy-for-Bitcoin-Cash
Step-by-step guide on how to retrieve the private key using the 12 words, https://github.com/LykkeCity/Tools/wiki/How-to-retrieve-private-key-using-the-12-words
If you want to get BCC immediately after the hard fork then you have to import this private key into a wallet that supports BCC.
If you don't want to import your private keys to another wallet then Lykke will also add support to withdrawal BCC some time after the hard fork.
https://www.reddit.com/r/lykke/comments/6py4r9/lykke_policy_for_bitcoin_cash/