It is not the first time that UNESCO gives recommendations, like they did for Potosi [cerro rico – “rich hill” which is still suffering deterioration] and for Tiahuanaco in 2010, please see this link for that earlier recommendation.
Now in 2012 El Deber printed EFE report, here excerpts from that news:
UNESCO encouraged Bolivia to hire experts for Tiahuanaco
A Unesco mission visited the pre-Hispanic Citadel of Tiahuanaco in the Highlands of La Paz, recommended the Bolivian Government to restore the so-called Puerta del Sol with Machu Picchu experts, the archaeological complex of Peru, an official source said today.
The delegation was headed by the director of the regional Office of the Organization of the United Nations Educational, scientific and Cultural Organization (Unesco), American Andrew Radolf, who was accompanied by other nine experts from different nationalities, stated Bolivian culture Minister Pablo Groux.
He pointed out that the case of the Puerta del Sol, Unesco recommended “articulated work with specialists of the region, more particularly of Machu Picchu to a treatment that is not invasive” to remove lichens that have formed in the monument.
The Puerta del Sol is a block of stone of three meters in height and almost 10 tons of weight decorated with iconography and reliefs of the mysterious ‘tihuanacota’ culture that flourished between the years 1580 BC and 1172 AD.
Deterioration by the plant parasite and progressive loss of their bas-reliefs led authorities to pose a few years ago the possibility of moving from the place in the open air where is Tihuanaco to a Museum, although the Mission of Unesco recommended not to.
According to Groux, the Agency pointed out that a possible relocation of the monument could damage it, since the base that holds it is cement and does not correspond to its original structure.
Unesco also gave the green light to the resumption of excavations at the archaeological complex, paralysed from 2010 on the recommendation of the same organism in a previous mission.
These works may be made subject to the approval of the Centre of archaeological, anthropological research and management of Tiahuanaco (CIAAAT), composed of national, local and indigenous authorities and experts, the Minister said.
According to Groux, Unesco has recommended that “measures of security in certain monuments”, as the Kalasasaya Temple and the Akapana pyramid be applied for public events.
“Means that it’s a true spiritual Center with a permanent interaction with citizens and communities, therefore it is not to restrict this type of activities, but to need to manage them properly,” he justified.
Bolivia needs to take care better of our archaeological sites for our own edification and to share with the world.