How to Default Address Style Format For Customer Address Creation ?

Goal:

How to default the Address format style when creating a new account site address ?

Which Address Format will be considered for Customer Address Creation for Czech Republic , we need to understand on what basis system is populating these attributes and from which address style ?

We are configuring Customers and observed the below :

In manage format address for CZECH Republic Country, it is showing 2 Address formats i.e. No Style Address and CZECH HCM Address format.