(1) The scale to which any plan is drawn shall be clearly stated on each drawings

(2) Site-plans and main sewerage plans shall be drawn to one of the following scales-

a) if the area of the site exceeds one hectare, 1 to 2 000, 1 to 1 000 or 1 to 500;

b) if the area of the site is one hectare or less; 1 to 500, 1 to 200 or 1 to 100.

(3) Working-drawings shall be drawn to a scale of 1 to 100, 1 to 50 or 1 to 20

(4) Detailed sewerage plans shall be drawn to a scale of 1 to 100 or 1 to 50.

(5) Detail drawings shall be drawn to a scale of 1 to 50, 1 to 20, 1 to 10, 1 to 5, 1 to 2 or 1 to 1.

(6) In the case of stress diagrams, a scale shall be used from which accurate determination of stresses and forces can be made by measurement.

(7) Local authorities may permit other scales to be used if a reasonable need to use other scales can be demonstrated.