That is a yield of about 5.9% on current share price.
IMO, the board probably wants OZL to be a growth stock rather than a yield stock.
So, assuming my assumption is correct, they will be careful in managing market expectations. They will not decrease the dividend from 30c. (wrong message being sent - i.e cash is tight). They will not make it 50c (wrong message being sent - yield rather than growth) They will either keep it at 30c or maybe go for 35c. At a pinch, they may go for 40c.
I hope you can understand my reasoning here.
I do not think franking can occur yet. From my understanding, this half is the first time they will be paying tax (and thus generating franking credits)
HT1
OZL Price at posting:
$11.86 Sentiment: LT Buy Disclosure: Held