Composting material
 16. (1) The composting material must be a mixture that contains only dead farm animals and substrate.  O. Reg. 106/09, s. 16 (1). (2) The substrate must consist only of one or more of the following materials: 1. Sawdust, shavings or chips derived from wood that is clean, uncontaminated and has not been treated in any way or come into contact with any chemical. 2. Straw consisting of dried stalks and leaves of cultivated grain, corn or beans. 3. Clean hay or silage. 4. A mixture composed only of livestock manure (other than poultry manure) and bedding materials described in any or all of paragraphs 1, 2 and 3, if the mixture is at least 30 per cent dry matter, by weight. 5. Poultry litter.  O. Reg. 106/09, s. 16 (2). (3) At the beginning of the composting process, the composting material must be composed of dead farm animals and substrate in the following proportions: 1. In the case of a method of composting other than in-vessel composting, the mixture must contain by volume no more than 25 per cent dead farm animals and no less than 75 per cent substrate. 2. In the case of in-vessel composting, the mixture must contain by volume no more than 50 per cent dead farm animals and no less than 50 per cent substrate.  O. Reg. 106/09, s. 16 (3). (4) If, at any point during the composting process, more dead farm animals are to be added to the composting material, they must first be combined with substrate in accordance with the proportions set out in subsection (3).  O. Reg. 106/09, s. 16 (4). (5) Composting material that is being composted using a method of composting other than in-vessel composting must be covered at all times by, (a) at least 0.6 metres of wood chips derived from wood that is clean, uncontaminated and has not been treated in any way or come into contact with any chemical; (b) at least 0.6 metres of clean hay or straw; (c) at least 0.6 metres of poultry litter, but only if the composting takes place in a fully enclosed structure that has a concrete floor; or (d) a non-compostable, retractable covering that, (i) minimizes odours that could attract scavengers, insects, rodents and other pests from escaping the composting material, (ii) prevents scavengers, insects, rodents and other pests from accessing the composting material, and (iii) is free from materials that will contaminate the composting material or the regulated compost.  O. Reg. 106/09, s. 16 (5). (6) Subsection (5) does not apply when composting material is being inspected or otherwise tended to or if new materials are being added to it.  O. Reg. 106/09, s. 16 (6). (7) Composting material must undergo composting until the material, (a) contains, on a visual inspection, no remaining, (i) soft animal tissue, (ii) bones or bone fragments larger than 15 centimetres in any dimension, and (iii) any other animal matter larger than 25 millimetres in any dimension; and (b) no longer emanates an offensive odour.  O. Reg. 106/09, s. 16 (7). (8) Composting material that satisfies the requirements of subsection (7) is regulated compost for the purposes of this Regulation.  O. Reg. 106/09, s. 16 (8). (9) In this section, “poultry litter” means a mixture composed only of poultry manure and bedding materials described in any or all of paragraphs 1, 2 and 3 of subsection (2), if the mixture is at least 40 per cent and no more than 60 per cent dry matter, by weight.  O. Reg. 106/09, s. 16 (9).