This file comes from the website of the Duma of Volgograd Oblast and is copyrighted. This file is licenced under the Creative CommonsAttribution 3.0 Unported Licence. In short: you are free to distribute and modify the file as long as you attribute www.volgoduma.ru.
The permission letter from the Office of the Duma of Volgograd Oblast (the Russian Federation) is available as Volgoduma authorisation letter.pdf