; (2) in subparagraph (B)(i), by striking subparagraph (A)(iv) and inserting subparagraph (A) ; (3) by striking subparagraph (E); and (4) by adding at the end the following new subparagraphs: (E) Weighting limitation No single measure specified by the Secretary or individual measure within a composite measure so specified may be weighted less than 10 percent of the total performance score. (F) Statistically valid and reliable In specifying measures under subparagraph (A), the Secretary shall only specify measures that have been shown to be statistically valid and reliable through testing. . (b) Endorsement Section 1881(h)(2)(B) of the Social Security Act ( 42 U.S.C. 1395rr(h)(2)(B) ) is amended— (1) in clause (ii), by adding at the end the following new sentence: The exception under the preceding sentence shall not apply to a measure that the entity with a contract under section 1890(a) (or a similar entity) considered but failed to endorse. ; and (2) by adding at the end the following new clause: (iii) Composite measures Clauses (i) and (ii) shall apply to composite measures in the same manner as such clauses apply to individual measures. . (c) Requirements for dialysis facility compare star rating program Section 1881(h)(6) of the Social Security Act ( 42 U.S.C. 1395rr(h)(6) ) is amended by adding at the end the following new subparagraph: (E) Requirements for any dialysis facility compare star rating program To the extent that the Secretary maintains a dialysis facility compare star rating program, under such a program the Secretary— (i) shall assign stars using the same methodology and total performance score results from the quality incentive program under this subsection; (ii) shall determine the stars using the same methodology used under such quality incentive program