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| Enclosure 3                                                           |
|                                                                       |
| Details of Head of Internal Audit                                     |
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Details of Head of Internal Audit

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| Name             | Mr. Vacharachai Somboonying                       |
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| Title            | Internal Audit Manager                            |
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| Education        | - Bachelor Degree in Finance                      |
|                  |                                                   |
|                  | - Master of Science, Corporate Governance,        |
|                  | Chulalongkorn University                          |
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| Working          | 2008 – present – Internal Audit Manager           |
| Experience       |                                                   |
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| Training         | - Skills for Auditor in-chart Program – The       |
|                  | Institute of Internal Auditor of Thailand         |
|                  |                                                   |
|                  | - Internal Audit Risk Assessment and Internal     |
|                  | Control, Federation of Accounting Professions     |
|                  |                                                   |
|                  | - Prepare for Certification of Internal Auditor   |
|                  | (CIA), Chulalongkorn University                   |
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| Duties and       | 1. Prepare the Charter on Power, Duties, and      |
| Responsibilities | Responsibilities of the Internal Audit            |
|                  | Department.                                       |
|                  |                                                   |
|                  | 2. Define the purposes, goals, and scope of       |
|                  | internal audit, set up an annual audit plan,      |
|                  | long-term audit plan, and annual budget, and      |
|                  | report the operation result based on the audit    |
|                  | plan and fixed budget.                            |
|                  |                                                   |
|                  | 3. Prepare the Internal Audit Manual as well as   |
|                  | the Internal Audit Standard.                      |
|                  |                                                   |
|                  | 4. Manage the Internal Audit Department, and      |
|                  | oversee the internal auditors’ performance at all |
|                  | levels, and organize the structure, allocate the  |
|                  | internal audit affairs, and allocate resources of |
|                  | the Internal Audit Department.                    |
|                  |                                                   |
|                  | 5. Prepare the audit program, and assess the      |
|                  | adequacy and proficiency of the Company’s         |
|                  | internal control system and operation quality as  |
|                  | assigned.                                         |
|                  |                                                   |
|                  | 6. Assess the reliability and accuracy of         |
|                  | financial information and operating information.  |
|                  |                                                   |
|                  | 7. Inspect to ensure that the operations of every |
|                  | department are in line with the policy, goals,    |
|                  | objectives, work plan, and regulations of the     |
|                  | Company and other related laws.                   |
|                  |                                                   |
|                  | 8. Review the methods used to prevent the loss of |
|                  | properties, and assess whether the resources are  |
|                  | used safely, cost-effectively, and efficiently or |
|                  | not.                                              |
|                  |                                                   |
|                  | 9. Review the auditing report, provide advice for |
|                  | further improvement, and follow up the            |
|                  | performance based on such advice.                 |
|                  |                                                   |
|                  | 10 Formulate the working standard, and review     |
|                  | whether the internal auditors perform as per the  |
|                  | established standard or not.                      |
|                  |                                                   |
|                  | 11. Arrange the cost and expense calculation      |
|                  | system used in auditing, and control the auditing |
|                  | plan.                                             |
|                  |                                                   |
|                  | 12. Prepare the auditing report to be proposed to |
|                  | the Management, the Audit Committee, and the      |
|                  | Board of Directors.                               |
|                  |                                                   |
|                  | 13. Follow up the work performance to ensure that |
|                  | it is in line with the established purposes in    |
|                  | order to boost the Internal Audit Department’s    |
|                  | work efficiency for the Management.               |
|                  |                                                   |
|                  | 14. Select and develop the internal auditors at   |
|                  | all levels to enhance the auditing knowledge and  |
|                  | skills enabling them to attain the established    |
|                  | goals.                                            |
|                  |                                                   |
|                  | 15. Arrange the work performance evaluation for   |
|                  | every worker at all levels in the Internal Audit  |
|                  | Department.                                       |
|                  |                                                   |
|                  | 16. Provide advice, comments and suggestions,     |
|                  | guideline on compliance with rules, orders, and   |
|                  | internal control of the organization.             |
|                  |                                                   |
|                  | 17. Perform other special tasks assigned by the   |
|                  | Management, and the Audit Committee.              |
|                  |                                                   |
|                  | 18. Coordinate with the Management, Audit         |
|                  | Committee, external auditors, advisors, and       |
|                  | executives of related agencies.                   |
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