Yes, previously as part of audit requirements you are required to internally store all certificates you've issued for at least seven years. Seeing as CT is now

Yes, previously as part of audit requirements you are required to internally store all certificates you've issued for at least seven years. Seeing as CT is now here though (which is a much more robust system since it's tamper-resistant), storage on your own archives is no longer needed (as long as you can prove that you log them all in CTs).