An award may, however, be set aside where the arbitrator has misconducted himself (an arbitrator may also be removed by the court on the ground of misconduct), or where it is ultra vires, or lacks any of the other requisites - above mentioned - of a valid award, or where the arbitrator has been wilfully deceived by one of the parties, or some such state of things exists.
In the choice of a boiler of this description it should be remembered that rapid heating, economical combustion of fuel, and facilities for cleaning, are requisites, the absence of any of which considerably lowers the efficiency of the apparatus.
The first requisites of all human beings are food and protection, in their search for which men are brought into intimate relations with the forms and productions of the earth's surface.
The main requisites for a productive oil or gas field are a porous reservoir and an impervious cover.
For the first requisites of a primitive settlement - food supply and defence - it afforded every advantage.