You are correct in that if this were a foreclosure, then the federal act "2009 Protecting Tenants at Risk of Foreclosure" would apply.
As this is a sale, the act does not apply.
Unfortunately, the Landlord can terminate the tenancy with proper 15 day Notice of Termination if the tenancy is month-to-month.
Yes, you are covered by this act. Do you have a lease?
Legal disclaimer: This answer is offered for informational purposes only. It is not offered as, and does not constitute, legal advice nor does it constitute an attorney-client relationship. Thank You