Service on owner or occupier affected by notice of acquisition.

As soon as may be after action has been taken under section 5 the [Collector] shall cause to be served by registered post on the owner of the land and also on the occupier in cases where the owner is not in occupation of the land or, where the person to be served is not readily traceable or the ownership of the land is in dispute, shall publish in the Gazette, a notice stating the particulars specified in section 3.