The World Heritage Committee,
1. Having examined Document WHC-11/35.COM/7B,
2. Recalling Decision 33 COM 7B.137, adopted at its 33rd session (Seville, 2009),
3. Acknowledges the information provided by the State Party regarding the measures implemented to address the recommendations made by the World Heritage Committee, and urges it to submit an official management plan, including provisions for public use and risk management and to secure the necessary resources to ensure its full implementation;
4. Also urges the State Party to develop and implement a comprehensive conservation programme for the tunnels and to establish conservation guidelines for interventions at the property;
5. Reiterates its concern that the site of Rio Amarillo is being considered for the construction of the airfield, in spite of previous World Heritage Committee decisions, yet acknowledges that additional information has been gathered and new studies have been produced after the 2005 reactive monitoring mission conducted by ICOMOS, which requires further analysis;
6. Accepts the State Party's invitation for a joint World Heritage Centre/ICOMOS reactive monitoring mission in 2011 to assess the state of conservation of the property and particularly review all the information produced up to this date regarding the project of building an airfield in the site of Rio Amarillo, including environmental impact assessments, and a heritage impact assessment, in order to update the analysis for consideration and review by the World Heritage Committee;
7. Requests the State Party to submit to the World Heritage Centre for review by the Advisory Bodies, in accordance with Paragraph 172 of the Operational Guidelines, the related technical information for the new protective shelter for the hieroglyphic stairway and for the conservation laboratory for sculptures, prior to approval and implementation;
8. Further urges the State Party to officially submit information on regulatory measures, land tenure, related cartography for the protection and management of the property and the buffer zone by 30 November 2011;
9. Also requests the State Party to submit to the World Heritage Centre, by 1 February 2012, a detailed report on the state of conservation of the property and on the progress made in the implementation of the above, for examination by the World Heritage Committee at its 36th session in 2012.