3. The authorised development may not commence until a written scheme setting out all stages of the authorised development and including a plan indicating when each stage will be implemented, has been submitted to each relevant planning authority.
(a)The written scheme submitted under this sub-paragraph may be amended by the undertaker. Where any amended written scheme is submitted under this sub-paragraph, any prior submitted written scheme will be held to be superseded.
(b)Any amended written scheme must be submitted to each relevant planning authority before any amendment may take effect for the purpose of sub-paragraph (4).