30. (1) Subject to any directions that may be issued by the Board, the chief executive officer may—

(a) delegate in writing any of his or her functions under section 29 to employees of the Agency specified by name, grade, position or otherwise, and

(b) where and to the extent specified in a delegation made under paragraph (a), authorise the sub-delegation of any or all of the functions delegated under paragraph (a) to or by other employees of the Agency.

(2) Any function delegated or sub-delegated under this section to an employee of the Agency shall be performed by the employee under the general direction and control of the chief executive officer and in compliance with such directions, limitations and guidelines as may be specified by—

(a) in the case of a delegated function, the chief executive officer, or

(b) in the case of a sub-delegated function, the employee who sub-delegated that function.

(3) The delegation or sub-delegation of a function does not preclude the chief executive officer from performing the function.

(4) The chief executive officer may—

(a) vary any delegation of a function under this section, including by modifying the geographical area to which the delegation relates,

(b) revoke such delegation, or

(c) without revoking the delegation, revoke any sub-delegation of the function.

(5) On varying or revoking the delegation or sub-delegation of a function, the chief executive officer shall inform each employee to whom the function was delegated or sub-delegated of its variation or revocation.

(6) An employee of the Agency who sub-delegates a function delegated or sub-delegated to the employee under this section—

(a) may vary the sub-delegation, including by modifying the geographical area to which it relates,

(b) may revoke the sub-delegation, and

(c) is not precluded from performing the function.

(7) On varying or revoking the sub-delegation of a function, the employee who sub-delegated the function under subsection (6) shall inform each employee to whom the function was sub-delegated of its variation or revocation.