With regards to the impending rule changes in 2019, consider downloading the free RULES ‘Apps’ from the R&A available from the Apple App store & Google Play Store platforms.
The Official Rules of Golf App
Available FREE on iPhone, iPad and Android. From on-course behaviour, through a summary of the fundamental Rules to the complete Rules of Golf (effective January 2016) and a new interactive quiz you’ll soon find the answer you are looking for.
The Official Decisions on the Rules of Golf App
The official interpretation of the Rules of Golf from The R&A – the game’s governing body, now available FREE in an updated edition for 2016 – 2017. It provides clear answers to practical problems encountered when playing golf. Decisions follow a simple question and answer format, making them easy to understand and act upon.