There are a variety of products and downloads which have been designed with you, the official, in mind:
Official Netball Rules
From September 2016 all domestic competition in England have been played in line with the International Netball Federation (INF) new rules.
The new rules include a number of changes that are not only important for officials to understand, but for players and coaches as well. To fully understand what changes have been made and how these will affect you and your game please visit this website: https://www.englandnetball.co.uk/new-rules-page-new-season/
For more information on the rules and how they may specifically affect your role in netball visit https://www.englandnetball.co.uk/make-the-game/officiating/rules-updates/