Chapter 29:15 URBAN COUNCILS ACT (g) the quarrying of stone; or (h) the cutting of firewood, brushwood or grass. Removal of unauthorized buildings on council land 19. The removal of unauthorized buildings on land under the control of the council. Advertisements 20. (1) The regulation of the erection, display and use of any advertisement or sign, and any apparatus, device or surface upon which an advertisement or sign is displayed or which is erected or intended for the display of advertisements. (2) The prohibition of the erection of hoardings which constitute a disfigurement of, or a source of annoyance to, the neighbourhood. (3) The prohibition or regulation, and the inspection, supervising and licensing, of the use and passage of advertising vans, sandwich-boards, lanterns, flags, screens or other movable advertising devices. (4) The prohibition and removal of advertising signs and the like which, in the opinion of the council, are a danger to traffic. Depreciation of property 21. The prohibition of— (a) the carrying out on land or in buildings or any work; or (b) the utilization of any land or buildings in a manner; which would be likely to depreciate or disfigure property, or to interfere with the convenience or comfort of the neighbours or with the amenities of the locality or to become a source of danger. Overcrowding 22. The prevention of the overcrowding of any building and defining what shall constitute such overcrowding. Regulation and control of occupation and use of land or buildings 23. (1) Notwithstanding any other enactment, for regulating and controlling the occupation or use of accommodation which is occupied or used by, or which is designed or is intended for occupation or use by, employees, the number of persons who may occupy or use any land or buildings in the council area, for the summary eviction of any person occupying or using any land or building in contravention of the by-laws and the removal of any property, including any building or structure unlawfully erected, in connection with such eviction and for empowering the council to take measures to ensure compliance with the by-laws on the failure of any person to comply with his duty in that regard and to recover from such person any expenses incurred by the council in ensuring such compliance. (2) By-laws referred to in subparagraph (1) may provide that no compensation shall be payable in respect of property which is removed as referred to in that subparagraph and— (a) is destroyed and damaged in the course of such removal; or (b) is not claimed within a specified period of such removal and is destroyed. Excavations 24. Requiring all holes, wells, pits, excavations and ponds on any private land not effectively fenced or enclosed to be filled or to be adequately protected, and, on the failure of any person to do any act to comply with his duty in that regard, empowering the council to do the act at his expense. Masts and poles 25. The regulation of the erection of masts or poles, the material to be used and the painting thereof and the stays and other contrivances to be used in connection therewith. Hedges and trees 26. (1) The regulation of the planting of hedges, the position of hedges and the plants which may be used for hedges. 144