(5)He shall build watch-towers and light posts between the two lines of fences and at all corners around the field at a minimum distance of 50 metres from each other and the light posts and the watch-towers shall be so erected as to be clearly visible from inside and outside the fences. Lighting, with at least petromax lights, shall be arranged between 5.30 p. m. to 6 a. m. of the next day.
