(1) Flat insulating concrete form foundation walls shall be considered to be laterally supported at the bottom where the foundation wall,
(a) supports backfill not more than 1.2 m in height,
(b) is supported at the footing by a shear key and is supported at the top by the ground floor framing, or
(c) is dowelled to the footing with not less than 15M bars spaced not more than 1.2 m o.c.