(1)Soil-cement building-units shall not be use in masonry in the following cases-

a) in basement-walls or foundation-walls;

b) in lintels and arches;

c) in walls exposed, in the opinion of the local authority, to prolonged rainfall or continual dampness;

d) in veneered walls.

(2) Soil-cement blocks and soil-cement bricks may be used in bearing-walls other than those set out in subsection (1) if such walls are designed in accordance with the provisions of sections 63 to 82.

(3) In walls not designed in accordance with the provisions of sections 63 to 82-

a) soil-cement blocks may be used only in single-storey and double-storey buildings; and

b) soil-cement bricks may be used only in single-storey buildings.

(4) Two-storey buildings built of soil-cement block shall be strengthened by a concrete-belt course which is-

a) not less than 150 millimetres in depth, and of the full width and length of the walls; and

b) reinforced with two 10 millimetre-diameter mild-steel rods, or reinforcement of equivalent cross-sectional area; and

c) of Grade 20; and

d) situated immediately under the upper-floor joists;

and which shall extend continuously around the building.

(5) Conduits and piped, other than water-pipes, plumbing and drain-pipes, may be housed in chases in soil-cement walls:

Provided that, if such conduits or pipes are of an external diameter greater than 25 millimetres, such chases shall not be cut, but shall be built in as the work proceeds, and the wall shall be thickened around the chase to the extent of the dimensions of the chase.