) Commercially Available? (b) Produced by an international firm of which the firm is a member? (c) Developed internally by the firm? If no, How does the firm ensure that assurance engagements are performed in

responsibilities engagement partner clearly defined and communicated to that partner? 10 Does the firm have policies and procedures regarding to the assignment of engagement teams and the level of supervision

one of the following bodies: - Forest Stewardship Council (FSC); - Biomass Biofuels voluntary scheme (2BSvs); - Bonsucro; - International Sustainability and Carbon Certification (ISCC Plus

: FSC) - โครงการเชื้อเพลิงชีวภาพชีวมวลโดยสมัครใจ (Biomass Biofuels Voluntary Scheme: 2BSvs) - บองซูโคร (Bonsucro) - การรับรองคาร์บอนและการพัฒนาอย่างยั่งยืนระหว่างประเทศ (International Sustainability and