Obtaining BTC Cash (BCC) from BTC held in blockchain.info

I have been trying to get my head around BTC Cash (BCC) and at this point I am a bit confused.

On the date of the fork (1st August 2017) I held a small amount of BTC in a blockchain.info wallet.

But the situation is complicated by the fact that some of the BTC was in the default wallet (by default its called 'My Bitcoin Wallet'), while about half of the BTC was held in 'imported addresses' (about 4 addresses in total).

I have since transferred all funds held in 'imported addresses' to the default wallet. This was done after the 1st August.

So for the purpose of obtaining BCC, Im not sure what I need to do.

Is it the case that, I can obtain BCC equivalent to BTC held in the blockchain default wallet using the 12 word pass phrase. While, to obtain BCC equivalent to BTC held in 'imported addresses' I will need to use the 'private key' for each of those addresses?

Thanks for any help understanding this...