850R

We just purchased a CPO NX 300h. The vehicle is equipped with Lexus' Cloud Navigation as well as Android Auto. I have a few questions about Lexus' Navigation System. First off, is the Navigation System a subscription system? The reason I ask is that my Lexus Owners Website does not mention any subscription services for it? If it is a subscription service, what is the term and how long does the free period last and does the system turn off after the end of the free period? Finally, how are the maps updated?