component or subcomponent of the stress capital buffer requirement for a bank holding company. (b) Changes The Board may only make changes to the rule issued under subsection (a) through notice and comment rulemaking. (c) Stress capital buffer requirement defined The term stress capital buffer requirement has the meaning given the term in section 225.8(c) of title 12 of the Code of Federal Regulations. 302. Rulemaking relating to stress testing (a) In general Beginning in the first calendar year after the date of the enactment of this section, the Board shall, not less than 30 days before conducting a stress test pursuant to section 165(i) of the Financial Stability Act of 2010, issue a rule to establish each scenario to be used in such stress test. (b) Prohibition The Board may not, by rule or otherwise, subject any nonbank financial company to a climate-related stress test using the authority provided in section 165(i) of the Financial Stability Act of 2010. 303. GAO report (a) In general The Comptroller General of the United States shall, every 3 years, conduct a study and submit a report to the Congress with respect to the stress tests conducted by the Board under section 165(i) of the Financial Stability Act of 2010 in the 3 most recent calendar years. (b) Contents The report submitted to the Congress under subsection (a) shall— (1) evaluate whether the stress tests are sufficiently robust and promote preparedness