taxable period
(1) Taxable period The term “taxable period” means, with respect to any investment which jeopardizes the carrying out of exempt purposes, the period beginning with the date on which the amount is so invested and ending on the earliest of— (A) the date of mailing of a notice of deficiency with respect to the tax imposed by subsection (a)(1) under section 6212, (B) the date on which the tax imposed by subsection (a)(1) is assessed, or (C) the date on which the amount so invested is removed from jeopardy.