You should automatically get them. Since they are tradeable options, I would expect that you should see something like TRFO appear in your holdings which can be traded through your broker (including online brokers).
I had this with AQD in the past.
TRFO may not be the exact code, since I havent seen its trading code written down anywhere yet, but you get the idea.
Initially you would find that it has a 0c value, since its less than 70c. Its value should then increase in line with the share price, but at a possible discount depending on who's willing to buy or sell.
For example should TRF be worth $1, TRFO would be worth upto 30c, so perhaps you could sell it for 25c. It just works with the usual market forces of buyers and sellers.
Arbitrage normally plays a part too. For example if TRF is trading at $1 and TRFO 25c, then you could by TRFO and exercise it for 70c. In essence you are now buying a $1 stock for 95c. This forces the prices to stay closely linked.
The option will expire Jul 31 2012. If TRF never goes above 70c in that time, it is essentially worthless. Of course if you believe thats the case, then really theres no point taking up the Rights Issue.
TRF Price at posting:
48.0¢ Sentiment: LT Buy Disclosure: Held