CARB proposed a June 30, 2026 initial reporting deadline for SB 253 Scope 1 and 2 data for fiscal 2025 emissions. CARB is contemplating a single due date for all in-scope companies, rather than a due date based off of fiscal year-end (e.g., six months after a company's fiscal year-end). However, CARB asked for feedback on the feasibility of its proposed deadline and on the timing of Scope 3 emissions disclosures, which are required starting in 2027 for fiscal 2026 emissions. CARB will post draft reporting templates for Scope 1 and 2 emissions by the end of September 2025 for public feedback.