Act § 6(f) REGULATIONS AND EFFECTIVE DATE.
(1) REGULATIONS.—The Director shall, not later than the date that is 1 year after the date of the enactment of this Act, issue regulations to carry out chapter 32 of title 35, United States Code, as added by subsection (d) of this section.
(A) IN GENERAL.—The amendments made by subsection (d) shall take effect upon the expiration of the 1-year period beginning on the date of the enactment of this Act [Sept. 16, 2011] and, except as provided in section 18 and in paragraph (3), shall apply only to patents described in section 3(n)(1).
[Act § 3(n)(1) IN GENERAL.—Except as otherwise provided in this section, the amendments made by this section shall take effect upon the expiration of the 18-month period beginning on the date of the enactment of this Act [i.e., March 16, 2013], and shall apply to any application for patent, and to any patent issuing thereon, that contains or contained at any time—
(A) a claim to a claimed invention that has an effective filing date as defined in section 100(i) of title 35, United States Code, that is on or after the effective date described in this paragraph [March 16, 2013]; or
(B) a specific reference under section 120, 121, or 365(c) of title 35, United States Code, to any patent or application that contains or contained at any time such a claim.]
(B) LIMITATION.—The Director may impose a limit on the number of post-grant reviews that may be instituted under chapter 32 of title 35, United States Code, during each of the first 4 1-year periods in which the amendments made by subsection (d) are in effect.
Pub. L. No. 112-29, § 6(f), 125 Stat. 311 (Sept. 16, 2011)