Occidental assesses properties for impairments based on several factors, including the availability of funds for future exploration and development activities, favorable or unfavorable land development plans, the current and projected political and regulatory conditions, and the remaining lease term. If an impairment is detected, Occidental will determine whether a comparable transaction or implied acreage valuation for similar properties is available, and adjust the carrying amount of the unproved property to its fair value using the market approach.