will be observed, deals with the covering of roofs, and has
nothing to say to the structure of the roof itself or the material
of which that structure is to be composed. Sec. 308 provides that,
"No building shall be erected within any municipal district the
external walls of which building shall be wholly or in part of
wood, canvas, thatch, or other inflammable material, or the
internal partitions or ceilings whereof shall consist either wholly
or in part of calico, canvas, paper, or other inflammable material,
nor shall any verandah or baleony to any house or building be
roofed with canvas or other inflammable material." But, if any
building is constructed contrary to the provisions of that section,
the Council may order it to be removed, or they may, in their
discretion, permit by written licence the erection of a building
which does not comply with those provisions under such condi-
tions as they may impose. Again, in that section there is
nothing about the structure of roofs. Sec. 335, which is in the
same Part XV., authorizes the Council to make by-laws with
respect to various matters enumerated, relating to buildings,
plans, levels, foundations, thickness and height of walls, party
walls, height, size, dimensions, lighting, and ventilation of rooms,
the removal of walls contrary to the by-laws, the construction of
staireases. PI. (d) is in these terms, "The construction and
erection, size, and position of parapets, flues, and fireplaces in
any building"; while the final placitum () is "generally for
the carrying out of this Part of this Act." Possibly that last
provision would authorize the making of a by-law giving a
general approval under the powers of sec. 304 to a particular
kind of material for the covering of roofs, but it certainly would
not authorize the Council to substitute for the discretion con-
ferred upon it by sec. 308 and to be exercised in each particular
case, a general rule prescribed by by-law. I can find nothing,
having regard to the contents of that Part of the Act, to warrant
the suggestion that the Council has power to regulate the
material or structure of roofs. The legislature has dealt with
two particular matters in connection with buildings - the material
of the covering of roofs, and the material of walls and internal
partitions; but has said nothing about the material or structure