From the agreement announcment, https://www.goldenminerals.com/news/golden-minerals-enters-into-agreement-for-the-sale-of-velardea-and-other-properties-

"Under the terms of the agreement, Autlán will have the option to purchase the Canadian holding company ECU Silver Mining, Inc. which owns three of the Company’s Mexican subsidiaries, which together hold the Velardeña properties, including the Velardeña and Chicago mines (currently on care and maintenance), the two processing plants, mining equipment and other adjacent exploration properties.  The transfer would include the lease agreement pursuant to which the Company has leased the oxide plant to Minera Hecla, S.A. de C.V. through 2020.  The proposed transaction also would include the sale of the Rodeo and the Santa Maria project concessions."