A special economic zone (SEZ) is an area in which the business and trade laws are different from the rest of the country. Only a small number of these areas are mapped so far, however, estimates put the total number of SEZ worldwide at between 2,700 and 10,000. The proposed tagging for these areas is boundary=special_economic_zone, which has minor existing usage.
In addition, it is proposed to deprecate the tag protect_class=23, which has near-zero usage, in favor of this named tag. The proposal can be found here: https://wiki.openstreetmap.org/wiki/Proposed_features/Special_economic_zone I look forward to your comments and discussion.
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