If you read through the final rule you will find where they specifically updated Appendix A (the notice) to include the statement:
Although you may not be required to maintain flood insurance on all structures, you may still wish to do so, and your mortgage lender may still require you to do so to protect the collateral securing the mortgage. If you choose not to maintain flood insurance on a structure and it floods, you are responsible for all flood losses relating to that structure.
There was no intention to, and the final rule does not, waive the notice requirements and those that have not been providing it are subjecting themselves to potential CMPs.
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The opinions expressed are mine and they are not to be taken as legal advice.