the energy conservation promotion ACT B.E. 2535 (1992) (verify add on 2007) and
Ministerial Regulation Prescribing Standard, Criteria, and Energy Management Procedures In Designated Factories and Buildings B.E. 2552 and
Ministry of Energy Statement On Criteria and Procedure for the Management of Energy In Designated Factories and Buildings B.E. 2552.
Please find the attached file for your reference in Thai, let your staff translate for you first.
If not: I conclusion for you as below,
Recommend to the factory must let 3rd party to inspection and proof the report before submitted by the end of March yearly, starting from 2016 onward.