[Characteristics of the Bayon temple]
Chapter 1
The Bayon temple, located in the centre of the historical city Angkor Thom, was established by Jayavarman VII originally as a Mahayana Buddhism, although in the later days it was changed to another religious sect and extended and modified in its size and formation. The temple has a complicated layout mainly consisting of upper terrace on which the buildings such as the central tower are placed, the surrounding middle terrace composed of the cruciform corridor and the inner gallery, and the lower terrace where the outer gallery is placed outside of the northern and southern libraries or the like. The sculpture of the 173 giant deity faces, originally planned for the 181 faces on the 52 towers, and bas-reliefs on the walls, expressing vividly of the life of ordinary citizens of those days, stories of Siva and Visnu, Jayavarman VII, present spectacular unfolding picture stories. This is a unique characteristic of the design composition of Bayon not only in the Khmer but also in world architectural history. In aggregate, they praise the magnificent intention of the establishment of Bayon, namely the glory of the sacred temple protected by the gods and the sacred city of Angkor Thom. The distinctive attributes of Bayon that add a page to human spiritual history lie in this very expression of supreme creativity.
The deterioration and collapse of the monument, however, are considerable in its present state, and in spite of the fact it is one of the monuments which face most impending crisis, because of increased tourists as well, its restoration and conservation are becoming technically extremely difficult.
Bayon is not only one of the two great Angkor monuments standing abreast Angkor Wat, but also it is the temple representing the Khmer architecture in the context of neither of the monuments is indispensable if the Khmer traditional spirit is to be preserved. The conservation of Bayon pilots the conservation activities of the entire Khmer monuments and becomes experiences of extreme importance for the conservation activities of cultural heritage in the whole of Asia. We must endeavor to value the existence of Bayon as a monument and the magnitude of inheriting the monument in human history, including the religious significance that lives on in the heart of the Cambodian people.
[Conservation and Restoration]
Chapter 2
It is necessary, based on the academic and scientific studies of the wide-ranging fields, to grasp accurately the current condition of the Bayon temple and to specify the cause of deterioration where it is observed, through the continuous maintenance and administrative activities. Moreover, academic empirical research on the value of not only Bayon but also all related monuments is essential.

Chapter 3
The most important and prioritized part for conservation and restoration in the Bayon temple shall be identified through the academic researches. With respect to the Bayon temple, stabilizing the central tower and its preservation as well as conservation and restoration of the bas-relief are urgent tasks. The establishment of a system for controlling the structural deterioration extended over the entire temple complex is required.

Chapter 4
Along with the standardization of the restoration techniques, the establishment of a consensus of the technical level, with ethics considered, shall be required. For instance, utmost effort must be made for the conservation by attempting reuse of all original elements with repair. For the selection of the restoration method, the appropriateness must be verified and the actual restoration works shall be carried out by a skilled contractor.
The range for the reconstruction of monuments for parts where the original state is completely lost, shall be limited only when assured ground is present resulting from an investigation, and the purpose of the action shall be limited only for the protection of the building and the original element as well as improvement of historical value of the monument and the conservation of the traditional principle. To this end, a sufficient detailed documentation of the present situation and a verification of the prospect for restoration works shall be required, and the restoration must be carried out in view of traditional construction techniques.
The new material and applied method required to retain the present situation shall be studied carefully in accordance to the principle stated above.

Chapter 5
Whatever restoration work it may be, upon its completion, a monitoring system shall be established and a continuous observation shall be required. This will not only contribute for the discovery of the problems of the monument concerned, but will become a useful guide to reviewing and examining the restoration method.

[Environmental Preservation]
Chapter 6
The hydraulic system of Bayon is a form of the traditional principle of Khmer who attach great importance to the hydraulic circulation, which should be regarded as the expression of a strong will to environmental harmonization principle. This principle which is embodied not only at Bayon but also in the Angkor monuments should be not only inherited to posterity but also positively passed on to the world, and a restoration method shall be so selected that enables the conservation of this characteristic. To this end, administration and maintenance shall be required based on the continuous monitoring of the natural environment, such as the water, forests and weather in and around Bayon.

Chapter 7
As we consider the significance of the existence of Bayon and other Angkor monuments in the Khmer culture, the religious and ethnical customs still observed in the Angkor area and inland Cambodia are important subjects that should be preserved. Also the physical burden to various monuments and influences on the surrounding environment resulting from opening Bayon to tourism shall be carefully considered and coordinated. The continuous monitoring of social and cultural environment of this nature is preferred.

Chapter 8
In order to maintain the harmonious landscape for the whole Angkor area containing numerous monuments, a system that grasps and regulates every construction and demolition activity in this area shall be required. The conservation project for each monument must establish consensus on the restoration plan with regard to preservation of the entire landscape. Simultaneously, careful consideration must be given to the appearance of the construction site.

Chapter 9
The Bayon temple belongs to the continuous line of relationship of Angkor Thom and the Angkor monuments, not only in the architectural style, artistic style and structural technique, but also in historical, cultural and social value. By taking note of this close relation and carrying out the preservation projects comprehensively, we are able to find a way to enhancing the possibility of the preservation of the entire community. This means the protection of the historical infrastructure such as the hydraulic system that is still functioning in all fields, and leads to protect traditional social customs that originate from the natural features of the region. Consequently, it will form the background for the protection of the cultural heritage.

[The International Cooperative System for the Human Resources Development]
Chapter 10
Every country that has been engaged or plans to be engaged in the restoration project in the Angkor area shall consider international cooperation as a basic principle aimed at encouraging Cambodians to assume the conservation and restoration activity for Bayon and the Angkor monuments. In practice, each country should aggressively support the development of Cambodian experts engaged in the conservation activities, such as by providing a training program. The training should aim to develop talented people who acquire the restoration techniques and restoration planning skill while understanding the international value of the Angkor monuments and maintaining their keen interest. The support should include the establishment of the social status of these talented people. Furthermore, the conservation and restoration activities in the Angkor area shall be put forward in cooperation with APSARA, and any organization which carries out restoration activities should exchange information and guidelines, endeavor to interchange personnel, attempt to communalize the principle, and to standardize the techniques. Human resource development open to and by international exchange is one of the characteristics of Angkor.

Chapter 11
Further unification of the method for conservation and restoration and its development must be aimed in various occasions, such as concrete investigation or study for the restoration, open forum on deciding fundamental policies and technical method, presentation of actual examples as more effectual references on restoration techniques, and recording all these processes and making it open to the public. This must be strongly recognized as a vital part of conservation and restoration activities as a whole. To facilitate this, the documentation centre must be improved further.

Chapter 12
Not only the restored monuments but also the conservation and restoration experience and the techniques accumulated during the process must be respected as having common cultural value among humanity. Cambodian experts who have sufficient experience of the conservation and restoration works at Angkor shall assume the important responsibility for the future activity and be expected to convey and spread the Khmer tradition. These experts will become precious existence not only for the cultural restoration in other Asian regions, but also for hosting people from Asia. Namely, for the study and the human resource development in training technician and actual restoration projects and further as a location, Angkor will become a major centre in Asia concerning the field of the conservation and restoration of the cultural heritage.