83 STAT. ]
PUBLIC LAW 91-172-DEC. 30, 1969
tion provided by subsection (a) may, at any time after making such election, discontinue the amortization deduction with respect to the remainder of the amortization period, such discontinuance to begin as of the beginning of any month specified by the taxpayer in a notice in writing filed with the Secretary or his delegate before the beginning of such month. The depreciation deduction provided under section 167 shall be allowed, beginning with the first month as to which the amortization deduction does not apply, and the taxpayer shall not be entitled to any further amortization deduction under this section with respect to such equipment. " (d) CERTIFIED COAL M I N E SAFETY EQUIPMENT.—For purposes of this section, the term 'certified coal mine safety equipment means property which— "(1) is electric face equipment (within the meaning of section 305 of the Federal Coal Mine Health and Safety Act of 1969) required in order to meet the requirements of section 305(a)(2) of such Act, " (2) the Secretary of the Interior certifies is permissible within the meaning of such section 305(a)(2), and " (3) is placed in service before January 1, 1975. For purposes of this section, any property placed in service in connection with any used electric face equipment which the Secretary of the Interior certifies makes such electric face equipment permissible shall be treated as a separate item of certified coal mine safety equipment.
Post, p. 775.
" (e) SPECIAL RULES.—
" (1) The adjusted basis of any certified coal mine safety equipment, with respect to which an election is made under this section, shall not be increased, for purposes of this section, for amounts chargeable to capital account for additions or improvements after the amortization period has begun. "(2) The depreciation deduction provided by section 167 shall, despite the provisions of subsection (a), be allowed with respect to the portion of the adjusted basis which is not taken into account in applying this section." (b) CLERICAL AMENDMENT.—The table of sections for part VI of subchapter B of the chapter 1 is amended by adding at the end thereof the following new item: "Sec. 187. Amortization of certain coal mine safety equipment."
(c) EFFECTIVE DATE.—The amendments made by this section shall apply to taxable years ending after December 31, 1969.
TITLE VIII—ADJUSTMENT OF TAX BURDEN FOR INDIVIDUALS SEC. 801. PERSONAL EXEMPTIONS. (a) INCREASE TO $625 FOR 1970.— Effective with respect to taxable years beginning after December 31, 1969, and before January 1, 1971— (1) section 151 (relating to allowance of personal exemptions) is amended by striking out "$600" wherever it appears therein and inserting in lieu thereof "$625"; and (2) section 6013(b)(3)(A) (relating to assessment and collection in case of certain returns of husband and wife) is amended by striking out "$600" wherever it appears therein and inserting in lieu thereof "$625", and by striking out "$1,200" wherever it appears therein and inserting in lieu thereof "$1,250". (b) INCREASE TO $650 FOR 1971.—Effective with respect to taxable years beginning after December 31, 1970, and before January 1, 1972—
esA Stat. 42. ^SA Stat. 733.