in relation to land—
| (a) | means the person in whom the ownership in that land is vested or in whose name that land is registered, or if that person is absent from the Republic or his whereabouts are unknown, his authorized representative in the Republic; |
| (b) | which in the opinion of the executive officer has been purchased by any person but has not yet been registered in his name, means such purchaser; |
| (c) | which in the opinion of the executive officer is subject to a usufruct, means the usufructuary; |