It is particularly useful where finiteness assumptions are satisfied, for example finitely generated groups, or finitely presented groups (i.e. in addition the relations are finite).
If he is satisfied that proceedings are in accordance with justice, he endorses the record accordingly, whereupon the record is returned to the magistrate's court.
Desalination is currently expensive compared to most alternative sources of water, and only a very small fraction of total human use is satisfied by desalination.