The quorum of the Crown Agents and the arrangements relating to their meetings shall be such as the Crown Agents may determine.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

The validity of any proceedings of the Crown Agents shall not be affected by any vacancy among the members or by any defect in the appointment of a member or by any failure to comply with the requirements of paragraph 11.