Every employer is different man, but mine offered another 2 years when my first 2 years expired.
talking about docs for nom there is so much, check list can be found on the website, but on top of my head are training papers, organisational charts, position description, group certs, P&L papers, company BAS, overseas PCC, australian PCC. There are more that you just gotta check on yhe website bud. I went through with a MA just to make sure everything go right.
Good luck man.