We don't need to
Correct me if I'm wrong but any team promoted to the Championship must have an all seater stadium within 3 years. Any league 2 team and I would imagine the same applies to league 1 must have a minimum of 2000 seats within 3 years of entering the league. By May 09 it is 3 years since Accrington won promotion
The Conference Pyramid have similar but obviously on a smaller scale.
What is also very interesting is that any club that has been in the top two leagues of English soccer for at least 3 seasons and at some point later are relegated, they must remain all seater stadiums all they will not receive their safety certificate from the FA i.e Rotherham