Deputation of employees to other services

(1) No employee of the Board may be deputed to serve under any other employer without the approval of the Board for the duration of such deputation and the terms and conditions on which the deputation shall take effect: Provided that no employee may be deputed to foreign service against his will. (2) Where the services of an employee of the Board are placed at the disposal of a foreign employer, it shall be a condition of the deputation that the foreign employer shall, during the periods of such deputation, bear the entire cost of the services of the employee.