Richmond are the current champions and will play in the Green King IPA Championship next season.
Plymouth Albion went into administration on 8 April 2016 and an interim licence to run the club ended on 6 May 2016.
If that happens Wharfedale will not be relegated and subsequently other teams down through the league structure could be reprieved.
The champions are promoted to the Greene King IPA Championship and the bottom three teams are relegated to either National League 2 North or National League 2 South depending on the geographical location of the team.
The promoted teams are Henley Hawks and Hull Ionians champions of the 2014–15 National League 2 South and 2014–15 National League 2 North respectively, and Ampthill who won the promotion play-off against Bishop's Stortford.