public market may have a material adverse effect on the market price of our securities. The market price of our Class A common stock may also decline as a result of SunEdison disposing or transferring some or all of the outstanding Class A common stock it will own following the consummation of the Sponsorship Transaction. These dispositions might also make it more difficult for us to sell equity securities at a time and price that we deem appropriate.
Risks Related to Taxation
Tax provisions and policies supporting renewable energy could change at any time, and such changes may result in a material increase in our estimated future income tax liability and may limit the current benefits of solar and wind energy investment.
We face risks related to potential changes in tax laws that may limit the current benefits of solar and wind energy investment. Renewable energy facilities currently benefit from, or are affected by, various federal, state and local governmental incentives and regulatory policies. As discussed in "Government Incentives" within Item 1. Business, government incentives provide significant support for renewable energy sources such as solar and wind energy, and a decrease in these tax benefits could increase the costs of investment in solar and wind energy. For example, in 2013 the Czech Republic and Spain announced retroactive taxes for solar energy producers. If these types of changes are enacted in other countries as well, the costs of solar energy may increase.
In the United States, these policies include federal ITCs, PTCs, and trade import tariff policies, as well as state RPS and IRP programs, state and local sales and property taxes, siting policies, grid access policies, rate design, net energy metering, and modified accelerated cost-recovery system of depreciation. For example, the IRS Code provides an ITC of 30% of the cost-basis of an eligible resource, including solar generation facilities having commenced construction prior to the end of 2019, for which the percentage is currently scheduled to gradually be reduced to 10% for solar generation facilities commencing construction before December 31, 2022 with permanence thereafter. The U.S. Congress could reduce the ITC to below 30% prior to the end of 2019, reduce the ITC to below 10% for periods after 2022 or replace the expected 10% ITC with an untested production tax credit of an unknown amount. PTCs, which are federal income tax credits related to the quantity of renewable energy produced and sold during a taxable year, or ITCs in lieu of PTCs, are available only for wind power plants that began construction on or prior to December 31, 2019. The Wind PTC and ITC are extended to 2019 but reduced 20% in 2017, 40% in 2018, and 60% in 2019 before expiring in 2020. PTCs and accelerated tax depreciation benefits generated by operating renewable energy facilities can be monetized by entering into tax equity financing agreements with investors that can utilize the tax benefits, which have been a key financing tool for wind power plants.
The growth of our wind energy business may be dependent on the U.S. Congress further extending the expiration date of, renewing or replacing wind ITC and PTCs, without which the market for tax equity financing for wind power plants would likely cease to exist. Congress could decide to overturn the new ITC and PTC decisions in future years, which would materially affect our business. Additionally, we may be required to repay a Section 1603 Grant, with interest, if the U.S. Treasury were to successfully challenge a solar generation facility and wind power plant for which such a Section 1603 Grant has been made as not complying with the requirements of Section 1603.
Any reduction in our ITCs, PTCs or depreciation deductions as a result of a change in law, or any elimination or modification of the accelerated tax depreciation schedule, may result in a material increase in our estimated future income tax liability and may negatively impact our business, financial condition and results of operations. Additionally, in prior years we received grant payments for specified energy property from the U.S. Department of the Treasury in lieu of tax credits pursuant to Section 1603 Grant. As a condition to claiming these Section 1603 Grants, we are required to maintain compliance with the terms of the Section 1603 program for a period of five years beginning on the date the eligible solar and wind energy facility was placed in service. Failure to maintain compliance with the requirements of Section 1603 could result in recapture of all or a part of the amounts received under a Section 1603 Grant, plus interest.
In addition, the IRS or the Treasury Department, as applicable, may also challenge eligible tax basis in the relevant renewable energy property that was used to determine the amount of ITC, Section 1603 Grant or accelerated depreciation deductions claimed or applied for, as applicable, by subsidiaries of the Company or our tax equity partners with respect to our renewable energy projects. In some situations where SunEdison or other third parties made representations with regard to the fair market value or eligible basis of a renewable energy facility, the cash flows of that facility that would otherwise be distributed to our subsidiaries may be diverted to cover losses sustained by our tax equity financing parties in the event the ITC, Section 1603 Cash Grant or accelerated depreciation deductions, as applicable, are recaptured, reduced or disallowed by the IRS or Treasury Department, as applicable. In other situations, we may be directly responsible for making such tax indemnity payments. In addition, we have provided guarantees to our tax investors and other financing parties related to the recapture of these tax benefits as a result of transfers of our interests in our renewable energy projects to non-U.S. federal income tax payers