Modifications in Tender for Reconstruction and rehabilitation of an information center for environment protection in “Vlasina” protected area in Surdulica, published on http://www.ipa.cbc-bgrs.eu and http://www.surdulica.rs,  and in daily newspaper “Danas” on 22/01/2014, referring  to document Financial offer templates, Volume 4 – Form 4.2.3 Breakdown of the lump-sum price, section B) Redevelopment and extension of the existing facility, table – V Masonry works and technical specification.