k. develop cultivation activities by taking into account the bio-ecoregion which is a
landscape located within one or more watersheds.
[[File:Photo of mangrove in Brebes.png|thumb|400x400px|Photo of mangrove in Brebes]]
In addition, the National Spatial Plan has also defined protected areas where one of the areas in the coastal border and mangrove forest with the following criteria:
a. land along the edge of the sea with a distance of at least 100 (one hundred) meters from the point of the highest sea tide towards the land; or
b. land along the edge of the sea where the shape and physical condition of the coast is steep or steep with a distance proportional to the shape and physical condition of the beach.
c. Mangrove forest areas are defined by the criteria of a corridor along the coast with a width of at least 130 (one hundred and thirty) times the average value of the difference between the highest and lowest annual tides, measured from the lowest low tide line towards the land.
Furthermore, zoning regulations for protected areas and cultivation areas are carried out with the following considerations:
a. use of space for educational and research activities without changing the landscape;
b. provisions prohibiting the use of space that endangers public safety;
c. restrictions on the use of space around areas that have been designated as areas prone to natural disasters; and
d. limitation of space utilization which reduces the quality of environmental functions.
Meanwhile, special zoning regulations for coastal border areas must pay attention to:
a. use of space for green open space;
b. development of natural structures and artificial structures to prevent abrasion;
c. construction of buildings that are limited only to support beach recreation activities;
d. provisions for prohibiting the construction of buildings other than those referred to in letter c; and
e. provisions prohibiting all types of activities that can reduce the area, ecological value, and aesthetics of the area.
'''Reflection:''' In general, the National Spatial Plan has provided directions for all provinces, regencies, and cities to carry out planning based on environmental considerations from upstream to downstream, so that planning from each higher area will not have an impact on the area or region below it, in this case the coastal area. In addition, the National Spatial Plan also limits and prohibits certain level activities that can reduce the area, ecological value, and aesthetics of the area. This means that the National Spatial Plan is in line with the objectives of the integrated coastal zone management.