From my understanding from the announcement. it's based on a 'on market' buy back in a 12 month period.
I would assume that OZL would buy at market like any investor but spreading the buy back in a 12 month period ie. $200,000 mill / 12 months = approx 16mil per month.
That would give them $16mill to play with per month and buy back their shares at market price.
That's how i see it.
Any thoughts? All guess work here total newbie