All yard waste shall be separated by the owner or occupant from all other solid waste accumulated on the premises and shall be composted on the premises or placed in yard waste bags with the collector's logo and set out for collection. Yard waste bags shall not exceed 39 gallons in capacity or 40 pounds in weight. Two bundles of brush and small limbs, cut approximately four feet long and tied in bundles weighing 40 pounds or less, will be collected free of charge each week. As used in this section, "yard waste" means any debris such as grass clippings, leaves, garden waste, brush, and trees. Yard waste does not include tree stumps.