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properly disinfected immediately before and after completing work on such trees. All major pest problems sha11 be properly reported to the Golf Course Operations Manager. Steps shall be taken immediately to control the pest problems which have caused the tree disease. 6.7 All cutting tools and saws used in tree pruning shall be kept sharpened to result in final cuts with a nonabrasive wood surface and secure bark remaining intact. All trees six (6) inches in diameter or less shall be pruned with hand tools only. Chain saws will not be permitted on any trees six (6) inches in diameter or less. This is to prevent any unnecessary abrasions to cambial tissue that may predispose a tree to insect and/or disease problems. 6.8 Whenever pruning cuts are to be made, while removing limbs too large to hold securely in one hand during the cutting operation, the limbs shall be cut off first, one (1) to two (2) feet beyond the intended final cut. Then the final cut shall be made in a manner to prevent unnecessary tearing back of the bark and wood. Such cutting back shall not include the removal of any live healthy limbs in excess of six (6) inches in diameter without prior approval from the Golf Course Operations Manager. 6.9 No more than twenty-five (25) percent of the live wood may be removed from the crown of any tree, excepting live oaks which are limited to no more than ten (10) percent. As much of the crown should be kept in the tree as possible. 6.10 Any extraneous metal, wire, rubber or other material (i.e., stakes, ties) interfering with tree growth shall be removed when possible. 6.11 Any defective or weakened trees shall be reported to the Golf Course Operations Manager. If staking is needed, it must be done immediately. 6.12 The use of climbing spurs or spike shoes in the act of pruning tees is prohibited, excepting palms that are more than sixty-five (65) feet in height. 6.13 Beneficial animal or bird nests or nesting cavities shall be preserved and 41