Ann: Prospectus Convertible Note Entitlement Offer, page-12

Not meant as advice.
Notes can be converted each month into shares during the 3 year period in a minimum of $10,000 lots, anything less than that held will not be converted until the end of the 3 year period (unless there is a takeover etc).
If your allotment is close to 10,000 or you're looking at buying more you may want to take this into account.