Your company should provide this. There is no 'allowance' for a 3 ml level segment!! That is what will trigger a non-compliant approach. There should be a minimum level segment in the TMA.
Try continuous descent approach in Google - that will fill your day
It is now virtually a world-wide procedure.
This may help. I cannot instantly see the reference to 'any rate of descent' but in my experience there is no minimum in the TMA where CDA are 'required'.