41. "I don't want to drink contaminated groundwater . . . so, the zoning system is fine with me ." 42. More recent works are increasingly often using their own pollen zone systems in order to better reflect local circumstances. 43. The Education Act of 1979 regulated access to each type of school through a zoning system based on residency. 44. The US time-zone system grew from this, in which all zones referred back to GMT on the prime meridian. 45. The Zone System is concerned with control of image values, ensuring that light and dark values are rendered as desired. 46. It is relatively easy to make a transition from most existing zoning classification systems to the Euclidean II Zoning system . 47. "They are competing in the same areas, unlike in Europe and other countries where there are zoning systems , " he said. 48. In April 1935, Air Traffic Control in the United Kingdom was improved by the introduction of a new control zone system . 49. He extended the six-zone system developed by Philip Sclater for describing the geographical distribution of birds to animals of all kinds. 50. The Zone System requires that every variable in photography, from exposure to darkroom production of the print, be calibrated and controlled.
