National League System - Wikipedia
https://en.wikipedia.org/wiki/National_League_SystemFor the 2012–13 season, the FA announced a re-structuring of the National League System's lowest level, Step 7. It was split into three sub-categories, which were full Step 7 divisions, Step 7A and Step 7B. The categorisation depended on the ground facilities of the particular league's clubs. The required percentage of clubs to meet ground grade requirements for each of the categ…