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~ 21.5-3 MARTINSVILLE CODE It s~all be the routine responsibility of the board to study, investigate, and develop recommendations for the care, preservation, pruning, planting, replanting, removal or disposition of trees and shrubs in parks, along streets and in other publicly owned areas. (Ord. No. 2004-20, ~ III, 1-25-2005) Sec. 21.5-4. Term of office. The term of the five (5) persons appointed by city council shall be three (3) years, except that the term of one member appointed to the first board shall be for one year and the term of two (2) members of the first board shall be for two (2) years. In the event a vacancy should occur during the term of any member, his/her successor shall be appointed for the un-expired portion of the term. All persons appointed to the board shall be governed by the policy for appointments to boards and commissions adopted by city council. (Ord. No. 2004-20, ~ N, 1-25-2005) Sec. 21.5-5. Operation. The tree board shall choose its own officers, make its own rules and regu,lations and keep minutes of its meetings. A majority of the members shall constitute a quorum for the transaction of business. (Ord. No. 2004-20, ~ V, 1-25-2005) Sec. 21.5-6. Applicability. This chapter shall apply to trees, plants and shrubs located within street rights-of-way, parks and public places of the city. Trees, plants and shrubs located on private property that constitute a public nuisance shall be governed by the city's property maintenance code. (Ord. No. 2004-20, ~ VI, 1-25-2005) Sec. 21.5-7. Definitions. The following words are hereby defined for use in the administration and enforcement of this chapter: Caliper. American Association of Nurserymen standard for trunk measurement of nursery stock. Caliper of trunk shall be taken six (6) inches above the ground for and up to including four-inch size, and twelve (12) inches above the ground for larger sizes. Canopy cover. The crown branch area of a single tree or several combined trees. Critical root zone (CRZ). The area of undisturbed natural soil around a tree measured outward from a tree trunk representing the essential area ofthe roots that must be maintained or protected for the tree's survival. CRZ is one foot of radial distance for every inch of tree DBH, with a minimum of eight (8) feet. DBH. Diameter-at-breast-height (DBH) is tree trunk diameter measured in inches at a height of 4.5 feet above the ground. If a tree splits into multiple trunks below 4.5 feet, the trunk is measured at its most narrow point beneath the split. Supp. No. 61 1286