For the purposes of section 26(4) , an approved container, for which a material recovery facility operator has received a refund under the scheme, may enter landfill if the material recovery facility operator has proven, to the satisfaction of the Secretary, that (a) the container has become unsuitable to recycle in circumstances that were unforeseen by, or out of the control of, the material recovery facility operator; and(b) all reasonable steps were taken by the material recovery facility operator to prevent, or reduce the effect of, those circumstances on the containers; and(c) after those circumstances occurred (i) the container cannot be made suitable for recycling; or(ii) it is impracticable for the container to be made suitable for recycling.