; and (B) in section 327(a), by striking section 325(e) and inserting section 325(f) . (i) Amendment of claims (1) Post-grant review amendment practice Chapter 32 of title 35, United States Code, is amended by inserting after section 326 the following: 326A. Post-grant review amendment practice (a) Actions permitted During a post-grant review instituted under this chapter, the patent owner may move to take one or more of the following actions with respect to any challenged patent claim being reviewed: (1) Cancel the claim. (2) Propose a reasonable number of substitute claims whose patentability will be adjudicated by the Patent Trial and Appeal Board in accordance with subsection (c). (3) Propose a reasonable number of substitute claims to be examined in an expedited PGR reexamination in accordance with subsection (d). (b) Scope of claims An amendment to a patent under this section may not enlarge the scope of the claims of the patent or introduce new matter. (c) Amendment practice before the Patent Trial and Appeal Board (1) Patent owner’s initial motion For each challenged claim for which the patent owner seeks to propose a reasonable number of substitute claims, the patent owner shall be required to make a prima facie showing that each substitute claim— (A) responds to each ground of unpatentability on which the post-grant review was instituted; (B) meets the written description requirement under section 112(a)