There are currently two RB209 rulesets available for use in Gatekeeper. The appropriate ruleset to use depends on your location, cropping, and preference.
Users in England and Wales can chose to use the new version 9 of the RB209, referring to the new AHDB document and calculations, which requires an active internet connection. Alternatively you may prefer to keep using version 8 of RB209, utilising the PLANET system, which has been available through Gatekeeper for a number of years. Please note that at present, grass fields must be calculated using RB209 v8.
Users in Scotland should select the Scotland specific selection from the available list.