PUBLIC LAWS-H . 757--OCT. 8, 1940 Date of proclama- tion, etc., effect. 53 Stat. 14. 26 U. S. C., Supp. V,§23(l). Election by tax- payer. Nonelectionofamor tization deduction. Election by tax- payer. Manner, form, etc., of election. Computation of taxes. Recomputation of tax, etc. Compromises. 53 Stat. 462. 26 U. S. C., Sunpp V, 3761. Limitation of ad. justment. "(2) If the date of the proclamation or the date specified in the certificate referred to in paragraph (1) of this subsection occurs within sixty months from the beginning of the amortiza- tion period with respect to such emergency facility and after the beginning of the month which the taxpayer has previously fixed under subsection (c) for the taking, in lieu of the amortization deduction provided in this section, of the deduction allowed by section 23 (1), the taxpayer may elect (in accordance with para- graph (4) of this subsection) to terminate the amortization period with respect to such emergency facility as of the end of the month in which such proclamation was issued or in which occurred the date specified in such certificate, whichever is the earlier. In such case the amortization period with respect to such facility shall end with the end of such month in lieu of the end of the sixty-month period, and the termination of the amor- tization deduction under subsection (c) shall be disregarded. "(3) In the case of a taxpayer which has not in either of its returns specified in subsection (b) elected to take an amortization deduction with respect to an emergency facility, if the date of the proclamation or the date specified in the certificate, referred to in paragraph (1) of this subsection, whichever is earlier, is before the expiration of sixty months from the last day of the month in which such emergency facility was completed or acquired, then the taxpayer may elect (in accordance with para- graph (4) of this subsection) the amortization deduction pro- vided in subsection (a), using an amortization period beginning with the month following the month in which the emergency facility was completed or acquired and ending as of the end of the month within which such proclamation was issued or within which occurred the date specified in such certificate, whichever is the earlier. "(4) The election provided in paragraph (1), (2), or (3) shall be made by filing with the Commissioner, in such manner, in such form, and within such time, as the Commissioner with the approval of the Secretary may by regulations prescribe, a statement of such election. When such election has been so made, then, under regulations prescribed by the Commissioner with the approval of the Secretary, the taxes for all taxable years beginning with the taxable year in which the amortization period began, shall be computed in accordance with an amortization deduction computed in accordance with the method provided in subsection (a), but using (in lieu of the sixty-month period provided in such subsection) the amortization period specified in paragraph (1), (2), or (3), as the case may be. "(5) RECOMPUTATION OF TAX IN CASE OF ELECTION UNDER THIS SUBSECTION.- If the adjustment of the income or excess-profits tax liability for any taxable year necessary to give effect to para- graph (4) of this subsection is prevented (A) on the date of the certificate of the Secretary of War or the Secretary of the Navy or on the date of the President's proclamation, whichever is the basis of the taxpayer's election under this subsection, or (B) within one year from such date, by any provision of law (other than this paragraph and other than section 3761, relating to compromises), an adjustment of the tax liability shall neverthe- less be made if in respect of such taxable year a notice of deficiency is mailed or a claim for refund is filed, as the case may be, within one year after the date of such certificate or such proclamation, whichever is the basis of the taxpayer's election under this subsection. If at the time of the mailing of such notice of deficiency or the filing of such claim for refund, the 1000 [54 STAT.