Due to take effect on November 15, the circular consists of 4 chapters and 17 articles, detailing relevant criteria, regulations and guidelines for provinces and cities nationwide to follow.
Accordingly, the classification must be carried out on rectangular areas in three different zones: coastal, near-shore and offshore zones.
It requires the employment of scientific methods to collect statistics about the pollution level in each rectangle. Statistics should demonstrate the pollution cycle including origin and transformation progress.
There are four criteria to classify areas according to pollution risks, which are the level of pollution or pollution risks, the scope of pollution, the level of environmental sensitivity, and the threat to human health, marine and island ecology systems and the exploitation of marine and island resources.
The entire process follows three steps – calculation, evaluation and mapping.