The use of posts or wood treated with materials other than those in CAN/CGSB-32.311, Organic Production
Systems — Permitted Substances Lists, is prohibited.
a. Continued use and recycling of existing (prohibited) posts within the farm are allowed.
b. Acquisition of any additional material with these wood treatments is prohibited for new installations or
replacement purposes. Exceptions may be granted in vast rangeland and semi-arid regions, and will consider
the availability of alternate materials.