很多公共事业设备对更换电缆布线直接没兴趣：因为这将要求所有工程师重新接受训练。
Many utilities are simply not interested in changing their cabling: it would require all their engineers to retrain.
追溯适用这一标准的新服务或整容的车辆或部件，即综合布线系统或设计被界定之前，上述日期，应在谨慎的设计工程师。
Retrospective application of this Standard on new or facelift vehicles or components on which the PDS or design was defined prior to the above date shall be at the discretion of the design Engineer.
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