TQCSI audits and certifies a number of high-end hotel chains throughout Asia, many of whom are dedicated to sustainable operations and committing significant resources to do so.
Best practice is to compliment these sustainable operations with certification to ISO 9001, ISO 14001, ISO 45001 and ISO 22000.
Interestingly late last year, The International Standards Organisation (ISO) released ISO 21401, Tourism and related services – Sustainable management systems for accommodation establishment – Requirements.
This new Standard specifies environmental, social and economic requirements to implement a sustainability management system for aspects that can be controlled by the hotel. It won't be long before better hotels integrate ISO 21401 with their integrated management system.