397.Section 148 defines an authorised officer and responsible authority for the purposes of Part 3. The responsible authority for the central garden of Parliament Square (as defined in section 142) is the Greater London Authority. The responsible authority for other land, that is, the adjoining footways, is Westminster City Council. On the map in Annex A, the Greater London Authority area is lightly hatched and the Westminster City Council area is more densely hatched.