Are you converting these to closed end credit or are you just changing your required payment to one that assumes an amortization over a period of time?
Not really sure what you are doing since you reference "new accounts" will be amortized.
We will no longer have HE statements because we are doing away with Equicheck.
If these are remaining as open-end accounts then you cannot do away your periodic statements and they must continue to follow the requirements of 226.7.