The Power Source Framework Agreement is signed between the government and Oyu Tolgoi LLC, in order to develop Tavan Tolgoi Power plant. Tavan Tolgoi, the world’s largest coal deposit, has been part of the Oyu Tolgoi negotiations with Ivanhoe and Rio Tinto from the start.
Oyu Tolgoi is heavily entangled with Tavan Tolgoi, due to its demand for energy, Tavan Tolgoi’s proximity, and the Mongolian demand in the OTIA that power for the mine has to be sourced within Mongolia (rather than from China). A preliminary agreement was signed in 2014 but then retracted.
 http://ot.mn/the-ttpp-power-source-framework-agreement-signed/, https://globenewswire.com/news-release/2018/12/31/1679071/0/en/Oyu-Tolgoi-and-the-Government-of-Mongolia-sign-Power-Source-Framework-Agreement-for-Tavan-Tolgoi-based-power-project.html, https://uk.reuters.com/article/uk-riotinto-mongolia/rio-tinto-mongolia-sign-power-deal-for-oyu-tolgoi-copper-mine-idUKKCN1OU0QL, accessed 02/01/2019