Co-operation between the two companies and the opening of the underground facility are based on an interstate deal between Serbia and Russia on the oil and gas industries, made in 2008.
Saradnja dve firme i otvaranje podzemnog skladišta gasa zasnivaju se na međudržavnom dogovoru Srbije i Rusije o saradnji u industriji nafte i gasa, iz 2008. godine.