69Inclusion of incidental expenses

### 69 Inclusion of incidental expenses > The corporation may include in the estimate of the cost of the execution of a scheme – > > > > (a) the cost (computed according to a usual method of costing) of the provision by the corporation of any materials, plant, and labour, including a reasonable amount for the use and depreciation of any plant so provided; and > > > > > (b) such sum (not exceeding 12·5 per cent of the estimated cost of the works) as the corporation thinks proper in respect of – > > > > > > > > (i) the making of searches and the preparation of specifications, maps, plans, sections, and elevations in connection with the works; > > > > > > > > > (ii) the preparation of the scheme; > > > > > > > > > (iii) the supervision and inspection of the works during construction; and > > > > > > > > > (iv) printing and posting in connection with the scheme.