Before revision: If perpetual intervention is required to maintain these strict guidelines, the area will often fall into category IV or V. Category Ia Strict Nature Reserve Category Ib – wilderness area A wilderness area (IUCN Category Ib) is similar to a strict nature reserve, but generally larger and protected in a slightly less stringent manner.
After revision: If perpetual intervention is required to maintain these strict guidelines, the area will often fall into category IV or V. Category Ib – wilderness area A wilderness area (IUCN Category Ib) is similar to a strict nature reserve, but generally larger and protected in a slightly less stringent manner.