National League
Most National League clubs are fully professional, while most National League North and National League South clubs are semi-professional. Some professional clubs were previously in the English Football League (EFL), as opposed to clubs that have always been non-League. The National League is the lowest of the five nationwide football divisions in England, below the Premier League and the three divisions of the EFL, and is the top tier of the National League System of non-League football. The National League North and National League South form the sixth tier of English football. The National League consisted of only one division until 2004, but expanded as part of an extensive restructuring of the National League System beginning with the 2004–05 season.