High school graduation requirements; approved methods; consistency for cohorts of ninth grade students. Provides that, except in the case of certain individual or local elections to the contrary, no change adopted by the Board of Education or the Department of Education to any graduation requirement or approved method, defined in the bill as any Board-approved means, pathway, process, assessment, performance task, work-based learning option, set of criteria, or cut score by which a student may demonstrate completion of or proficiency in any graduation requirement, including any verified credit requirement, shall apply to any student who has already entered the ninth grade prior to the effective date of such change. The bill is applicable beginning with students who enter the ninth grade on or after July 1, 2027.