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Rh Federal—at least for purposes of the tax credits. If a State chooses not to follow the directive in Section 18031 that it establish an Exchange, the Act tells the Secretary to establish "such Exchange." §18041. And by using the words "such Exchange," the Act indicates that State and Federal Exchanges should be the same. But State and Federal Exchanges would differ in a fundamental way if tax credits were available only on State Exchanges—one type of Exchange would help make insurance more affordable by providing billions of dollars to the States' citizens; the other type of Exchange would not.

The conclusion that Section 36B is ambiguous is further supported by several provisions that assume tax credits will be available on both State and Federal Exchanges. For example, the Act requires all Exchanges to create outreach programs that must "distribute fair and impartial information concerning . . . the availability of premium tax credits under section 36B." §18031(i)(3)(B). The Act also requires all Exchanges to "establish and make available by electronic means a calculator to determine the actual cost of coverage after the application of any premium tax credit under section 36B." §18031(d)(4)(G). And the Act requires all Exchanges to report to the Treasury Secretary information about each health plan they sell,