Pierce Butler, United States v. Michel — Opinion of the Court
“ By the statute the United States waived its sovereign immunity from suit. The permission to sue is conditioned on the filing of a claim and the lapse of six months or the disallowance of the claim within that period, and is limited to not more than five years after payment of the tax, unless the claim has been disallowed and the action is commenced within two years from the disallowance. ”
