A rent officer, with the possibility of an appeal to a rent assessment committee, is responsible for determining the rent in a regulated tenancy that has been properly registered. This ensures that the rent amount is fair and regulated according to legal guidelines. Such regulations protect both the landlord and tenant, providing stability and consistency in the rental market. As a knowledgeable professor in finance, I urge you to familiarize yourself with these terms to make informed decisions in the real estate industry.