We have the two years before the bill comes into force--that's preparatory time. There is then a period of two years during which petitions are received. That's the period when communities have the opportunity to express their interest in having lighthouses in their area designated, and that's also the period when work needs to be done by them, if the lighthouse has been declared surplus, to propose a business case and to come forward as being willing to take over the lighthouse. There is then a period of three years in which the minister can evaluate those petitions.
At the end of that full five-year period after coming into force, the minister must publicly announce what the results of those deliberations are. So theoretically the minister could start designating from the time the bill comes into force—that would be two years from royal assent—but doesn't have to until the end of seven years from the date the bill is passed. So seven years from now the first designations would have to be announced, and that's the absolute latest.