General duty of planning authorities as respects trees
159Planning permission to include appropriate provision for preservation and planting of trees
It shall be the duty of the planning authority—
(a)to ensure, whenever it is appropriate, that in granting planning permission for any development adequate provision is made, by the imposition of conditions, for the preservation or planting of trees, and
(b)to make such orders under section 160 as appear to the authority to be necessary in connection with the grant of such permission, whether for giving effect to such conditions or otherwise.