(Unofficial Translation) 1 Licensing Manual: Application for Approval of Foreign Auditor (General Case) Authority: the Office of the Securities and Exchange Commission (public agency) Rules

Limited, CAT- IIG Nonthaburi sales project of the National Telecommunications Company, Project to improve the network system to support the large data transmission of the Expressway Authority of Thailand

Provincial Electricity Authority, the System trading Project for expanding GDCC (VM) services of the National Telecommunications Public Company Limited, the Equipment trading Project to expand IRIS premium

Laos EGAT Electricity Generating Authority of Thailand ERC Energy Regulatory Commission EPC Engineering, Procurement and Construction EVN Electricity of Vietnam FX Foreign exchange IPO Initial public

position) · Was the approval of the return of program rights in accordance with the authority? According to the operating authority table specified in the Company's manual, the approval for the return of

before Interest, Taxes, Depreciation and Amortization EDL = Electricite Du Laos EGAT = Electricity Generating Authority of Thailand ERC = Energy Regulatory Commission EPC = Engineering, Procurement and

Detail: 4.1 Project Characteristics Project Name Central Wastewater Treatment Plant and Collecting System of the industrial Zone of Mandalay (“CWTP”) Concessionaire Authority Mandalay City Development

, share subscription and deliver such share including contact and filing the application, documents and evidence to the Ministry of Commerce, SEC, SET government agency, and/or relating authority regarding

, documents and evidence to the Ministry of Commerce, SEC, SET government agency, and/or relating authority regarding the issuance and offering of newly issued shares, and the listing of the newly issued shares

relating authority regarding the issuance and offering of newly issued shares, and the listing of the newly issued shares in the SET; to have an authority to process as deemed necessary and appropriate