As obvious from the link, every state maintains two types of occupational lists. One list is for 176 visas and one is for 475 visas. 475 visas are mostly regional visas away from Metropolitan centres of the state.
So if your occupation is present on the 475 list of a state, then you can only apply for 475 visa. If your occupation is listed on the 176 list of a state then you can only apply for 176 visa.
Please note that 475 is a temporary 3 years work visa where as 176 is a permanent visa. Both of them require 100 points to qualify.
Here is a list of state/territories offshore 176 and 475 visas. The same applies for onshore 886 and 487 visas.