Where requirements, provisions of the DML (including the licence conditions) or protective provisions require approval from or agreement with the local planning authority or other person, such approval or agreement must be in writing and must not provide for development outside the parameters of the authorised development or for a form of development which would give rise to materially new or materially worse environmental effects in comparison with those assessed in the environmental statement or any updated environmental information supplied under the 2009 EIA Regulations.

When any details, plans or other matters have been agreed or approved by the local planning authority or other person in accordance with a requirement, the DML (including the licence conditions) or the protective provisions, those details, plans or other matters may subsequently be amended by agreement with the person concerned provided that no amendments to those details, plans or other matters would provide for development outside the parameters of the authorised development or for a form of development which would give rise to materially new or materially worse environmental effects in comparison with those assessed in the environmental statement or any updated environmental information supplied under the 2009 EIA Regulations.