Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Persepolis' has mentioned 'Buffer zone' in the following places:
Occurrence Sentence Text Source
The most significant identified challenge to the integrity of the property and its buffer zone is controlling its borders and boundaries against agricultural, industrial, and constructional development.
The inscribed World Heritage property, which is owned by the Government of Iran, and its buffer zone are under the legal protection and management of the Iranian Cultural Heritage, Handicrafts and Tourism Organization (which is administered and funded by the Government of Iran).
The property and buffer zone are also under a regional master plan with its own regulations.
A management plan covering the identification of borders, buffer zone, land ownership, conservation priorities, and time-tabled management interventions was introduced in 2001.