Simplify the following text for a Grade 13 native English-speaking person.
Original: The municipality key consists of five digits in Austria , which are generated as follows : The first digit designates the number of the Austrian state , the second and third digits designate the district , and the fourth and fifth digits designate the municipality .
Simplified: In Austria the municipality key has five digits which are chosen like this : The first number shows the number of the Austrian state , the second and third numbers show the district , and the fourth and fifth numbers show the municipality .