do we need to import zip, state and county in AX?

Hello, I have a question related to zip, state etc.  Do we need to set up or import the zip, state and county (US)? Is it mandatory? Does the system allow us to create address without these? 

If so, can someone suggest how we can create an excel sheet - where I can create space between Zip and State to

I have columns like ZipCodeId, City, StateId, CountyId 

here City should start at 63 charecter and size being 28 etc., 

so the text file will look like 

D90201                                        Los Angles                            CA

appreciate it much. Its strange that MS doesn't provide any sample file or even the file for US, Belgium or other countries.