7(1)Where there arises any dispute as to—U.K.
(a)the reasonableness of the withholding by the National Rivers Authority of approval required by paragraph 2(1)(a)(ii), 3 or 4(1)(c) above,
(b)whether, in relation to any work or operation, the requirement imposed by paragraph 2(1)(c) has been complied with, or
(c)the reasonableness of any requirements imposed under paragraph 2(1)(d) or 5(b) above,
the matter shall be referred to the Secretary of State for determination by him.
(2)Any difference between the Development Corporation and the National Rivers Authority as to whether costs have been reasonably incurred as mentioned in paragraph 4(1)(e) above shall be determined by arbitration.