The employer shall ensure at a construction site of a building or other construction work that,-
(a) the height of every tower scaffold used in building or other construction work is not more than eight times, the lesser of a base dimension of such scaffold;
(b) a tower scaffold is lashed to a building or a fixed structure before being used by the building workers;
(c) any tower scaffold which can be moved or castered is,-
(i) constructed with due regard to the stability and if necessary adequately weighted at the base;
(ii) used only on plain and even surface; and
(iii) has casters provided with positive locking devices to hold such scaffold in position;
(d) no building worker remains on board, scaffold, tools, material when it is being shifted from one position to another position.