If the appropriate agency is directed by the Secretary of State to consider whether the minimum acceptable flow for any particular inland waters ought to be determined or reviewed, the appropriate agency shall consider that matter as soon as reasonably practicable after being directed to do so.
After considering any matter under subsection (1) above the appropriate agency shall submit to the Secretary of State with respect to the inland waters in question either—
and subsections (6) and (7) of that section shall apply in relation to a draft statement under this subsection as they apply in relation to a draft statement under that section.
Without prejudice to the generality of paragraph 4 of Schedule 5 to this Act, the power of the Secretary of State under that paragraph to alter a draft statement before approving it shall include power to substitute a statement containing or amending any such provision as is mentioned in subsection (2) of section 21 above for such a draft statement as is mentioned in subsection (2)(b) of this section.