43.—(1) When in any requirement or in Parts 2 and 3 of Schedule 13 (protective provisions) approval or agreement is required of, or with, anybody in relation to the content, carrying out or use of the authorised development (including for the avoidance of doubt the approval of details or plans under the requirements) such approval or agreement must not be given if it would permit development outside of the parameters of the authorised development referred to in article 4 (parameters of authorised development) or would give rise to any materially new or materially different significant effects on the environment that have not been assessed in the environmental statement or in any updated environmental information supplied under the 2017 EIA Regulations.
(2) When any details, plans or other matters have been agreed or approved by the local planning authority under a requirement, or the relevant highway authority under a requirement or Parts 2 and 3 of Schedule 13, then they may subsequently be amended by agreement with the local planning authority or relevant highway authority as the case may be provided that no amendments to those details, plans or other matters may be approved where such amendments would permit development outside of the parameters of the authorised development referred to in article 4 (parameters of authorised development) or would give rise to any materially new or materially different significant effects on the environment that have not been assessed in the environmental statement or in any updated environmental information supplied under the 2017 EIA Regulations.
(3) Where a consent, agreement or approval is required or requested by the undertaker under a requirement then the procedure set out in Part 3 of Schedule 2 (requirements) for obtaining such consent, agreement or approval, and appealing against the refusal or failure to approve or refuse such consent, agreement or approval, applies.