Lithium Argentina AG

Commencement of Development of Thacker Pass

The assets and liabilities related to the Thacker Pass Project are a part of the assets and liabilities distributed to shareholders (Note 4). The Company determined that the technical feasibility and commercial viability of Thacker Pass had been demonstrated following the release of an independent National Instrument 43-101 feasibility study (the “Thacker Pass Feasibility Study”) on January 31, 2023, along with the receipt of the favorable ruling from the US District Court, District of Nevada (“Federal Court”) for the issuance of the Record of Decision (“ROD”), and the receipt of notice to proceed from the Bureau of Land Management (“BLM”) on February 7, 2023.

The Company entered into the engineering, procurement and construction management (“EPCM”) agreement and other construction-related contracts. Construction of Thacker Pass, including site preparation, geotechnical drilling, water pipeline development and associated infrastructure commenced. Accordingly, the Company transferred the capitalized costs of Thacker Pass from exploration and evaluation assets to property, plant and equipment and began to capitalize development costs starting February 1, 2023.

Concurrent with the transfer of the Thacker Pass assets from exploration and evaluation to property, plant and equipment, management completed an impairment test of Thacker Pass which compared the carrying value to the recoverable amount. The recoverable amount is the greater of the value in use and the fair value less disposal costs.

The fair value less disposal costs was calculated using a discounted cash flow model with feasibility study economics. The significant assumptions that impacted the fair value included future lithium prices, capital cost estimates, operating cost estimates, estimated mineral reserves and resources, and the discount rate. Based on the result of the impairment test, management concluded that there was no impairment.