Doing a wee bit of research into South32 and comparing re possibility of a TO on MYL here are a couple of suitable articles to help better understand the importance of that page 15 tracking Arizona Mining path to TO.
june 2018
https://www.copyright link/business/mining/silver/south32-ceo-graham-kerr-says-19b-arizona-mining-acquisition-is-a-game-changer-20180618-h11j0e