Common use of BASIS FOR PREPARATION OF THE CONSOLIDATED FINANCIAL STATEMENTS Clause in Contracts

BASIS FOR PREPARATION OF THE CONSOLIDATED FINANCIAL STATEMENTS. 2.1 The accompanying consolidated financial statements include the financial statements of TRC Construction Public Company Limited and the following subsidiaries which are owned directly and indirectly by the Company. Percentage of shareholdings (%) Country of As at December 31, TRC Investment Limited Holding company The Republic of Mauritius 100.00 100.00 TRC Utility Company Limited To produce and distribute tap water Thailand 99.97 99.97 Olive Technology Company Limited Data management and processing Thailand 49.97 - Hydrotek Sahakarn Joint Venture (held by Sahakarn Wisavakorn Company Limited) Construction services Thailand 49.00 49.00 TRC International Limited (held by TRC Investment Limited) Holding company Hong Kong 100.00 100.00 TRC Middle East LLC (held by TRC International Limited) Construction services Sultanate of Oman 70.00 70.00 TRC Engineering LLC (held by TRC International Limited) Construction services Sultanate of Oman 70.00 70.00 Mahat Company Limited (held by Olive Technology Company Limited) Data management and processing Thailand 59.98 - 2.2 The Company is deemed to have control over an investee or subsidiaries if it has rights, or is exposed, to variable returns from its involvement with the investee, and it has the ability to direct the activities that affect the amount of its returns. 2.3 Subsidiaries are fully consolidated, being the date on which the Company obtains control, and continue to be consolidated until the date when such control ceases. 2.4 The financial statements of the subsidiaries are prepared using the same significant accounting policies as the Company. 2.5 The assets and liabilities in the financial statements of overseas subsidiary companies are translated to Baht using the exchange rate prevailing on the end of reporting period, and revenues and expenses translated using yearly average exchange rates. The resulting differences are shown under the caption of “Exchange differences on translation of financial statements in foreign currency" in the statements of changes in shareholders' equity. 2.6 Material balances and transactions between the Company and its subsidiary companies have been eliminated from the consolidated financial statements. 2.7 Non-controlling interests represent the portion of profit or loss and net assets of the subsidiaries that are not held by the Company and are presented separately in the consolidated profit or loss and within equity in the consolidated statement of financial position. 2.8 The separate financial statements present investments in subsidiaries, associate and joint ventures under the cost method.

BASIS FOR PREPARATION OF THE CONSOLIDATED FINANCIAL STATEMENTS. 2.1 The accompanying consolidated financial statements include the financial statements of TRC Construction Public Company Limited and the following subsidiaries which are owned directly and indirectly by the Company. Percentage of shareholdings shareholding (%) Country of As at December 31, Sahakarn Wisavakorn Company Limited Construction service - basic infrastructure Thailand 99.99 99.99 TRC Investment Limited Holding company The Republic of Mauritius ofMauritius 100.00 100.00 TRC Utility Company Limited ** To produce and distribute tap water Thailand 99.97 99.97 - 50.00 AT Energy Solution Company Limited Energy production and distribution Thailand 50.00 50.00 Olive Technology Company Limited Data management and processing Thailand 49.97 - 49.97 Hydrotek Sahakarn Joint Venture (held by Sahakarn Wisavakorn Company Limited) Construction services Thailand 49.00 49.00 TRC International Limited (held by TRC Investment Limited) Holding company Hong Kong 100.00 100.00 TRC Middle East LLC * (held by TRC International Limited) Construction services Sultanate of Oman 70.00 - 70.00 TRC Engineering LLC * (held by TRC International Limited) Construction services Sultanate of Oman 70.00 - 70.00 Mahat Company Limited (held by Olive Technology Company Limited) Data management and processing Thailand 59.98 -59.98 SAHAHYDRO PATTAYA Joint Venture (held by Sahakarn Wisavakorn Company Limited) Construction services Thailand 100.00 100.00 * On September 30, 2022, the subsidiary has dissolued the business and undergone the liquidation process. ** From August 16, 2021 the status of such company changed from the Subsidiary to the Joint venture with 50% shareholding. 2.2 The Company is deemed to have control over an investee or subsidiaries if it has rights, or is exposed, to variable returns from its involvement with the investee, and it has the ability to direct the activities that affect the amount of its returns. 2.3 Subsidiaries are fully consolidated, being the date on which the Company obtains control, and continue to be consolidated until the date when such control ceases. 2.4 The financial statements of the subsidiaries are prepared using the same significant accounting policies as the Company. 2.5 The assets and liabilities in the financial statements of overseas subsidiary companies are translated to Baht using the exchange rate prevailing on the end of reporting period, and revenues and expenses translated using yearly average exchange rates. The resulting differences are shown under the caption of “Exchange differences on translation of financial statements in foreign currency" in the statements of changes in shareholders' equity. 2.6 Material balances and transactions between the Company and its subsidiary companies Group have been eliminated from the consolidated financial statements. 2.7 Non-controlling interests represent the portion of profit or loss and net assets of the subsidiaries that are not held by the Company and are presented separately in the consolidated profit or loss and within equity in the consolidated statement of financial position. 2.8 The separate financial statements present investments in subsidiaries, associate and joint ventures under the cost method.

BASIS FOR PREPARATION OF THE CONSOLIDATED FINANCIAL STATEMENTS. 2.1 The accompanying consolidated financial statements include the financial statements of TRC Construction Public Company Limited and the following subsidiaries which are owned directly and indirectly by the Company. Percentage of shareholdings (%) Country of As at December 31, TRC Investment Limited Holding company The Republic of Mauritius 100.00 100.00 TRC Utility Company Limited To produce and distribute tap water Thailand 99.97 99.97 Olive Technology Company Limited Data management and processing Thailand 49.97 - Hydrotek Sahakarn Joint Venture (held by Sahakarn Wisavakorn Company Limited) Construction services Thailand 49.00 49.00 TRC International Limited (held by TRC Investment Limited) Holding company Hong Kong 100.00 100.00 TRC Middle East LLC (held by TRC International Limited) Construction services Sultanate of Oman 70.00 70.00 TRC Engineering LLC (held by TRC International Limited) Construction services Sultanate of Oman 70.00 70.00 Mahat Company Limited (held by Olive Technology Company Limited) Data management and processing Thailand 59.98 -70.00 2.2 The Company is deemed to have control over an investee or subsidiaries if it has rights, or is exposed, to variable returns from its involvement with the investee, and it has the ability to direct the activities that affect the amount of its returns. 2.3 Subsidiaries are fully consolidated, being the date on which the Company obtains control, and continue to be consolidated until the date when such control ceases. 2.4 The financial statements of the subsidiaries are prepared using the same significant accounting policies as the Company. 2.5 The assets and liabilities in the financial statements of overseas subsidiary companies are translated to Baht using the exchange rate prevailing on the end of reporting period, and revenues and expenses translated using yearly average exchange rates. The resulting differences are shown under the caption of “Exchange differences on translation of financial statements in foreign currency" in the statements of changes in shareholders' equity. 2.6 Material balances and transactions between the Company and its subsidiary companies have been eliminated from the consolidated financial statements. 2.7 Non-controlling interests represent the portion of profit or loss and net assets of the subsidiaries that are not held by the Company and are presented separately in the consolidated profit or loss and within equity in the consolidated statement of financial position. 2.8 The separate financial statements present investments in subsidiaries, associate and joint ventures under the cost method. 2.9 The subsidiary has joint arrangements which assessed as joint operations between the subsidiary and other joint operators. The subsidiary recognises its shares of assets, liabilities, revenue and expenses of the joint operation, in proportion to its interest, to the separate financial statements, the details as follows: Country of Interest in During the year 2018, Sahakarn Wisavakorn Company Limited, which is the Company’s subsidiary, entered into joint venture contract with Hydrotek Public Company Limited under the name of “Sahahydro Joint Venture” in order to bid and execution a new project from Provincial Waterworks Authority. The portion of investment between Sahakarn Wisavakorn Company Limited and Hydrotek Public Company Limited was 49% and 51%, respectively. Later, both parties agree that Xxxxxxxx Xxxxxxxxxx Company Limited will not share any gain and loss as well as damage maybe arisen from this project whereas Hydrotek Public Company Limited will be responsible for project execution. The subsidiary has outstanding obligation by Baht 131 million in respect of bank guarantee provided to joint venture.

BASIS FOR PREPARATION OF THE CONSOLIDATED FINANCIAL STATEMENTS. 2.1 The accompanying consolidated financial statements include the financial statements of TRC Construction Public Company Limited and the following subsidiaries which are owned directly and indirectly by the Company. Percentage of shareholdings shareholding (%) Country of As at December 31, Sahakarn Wisavakorn Company Limited Construction service - basic infrastructure Thailand 99.99 99.99 TRC Investment Limited Holding company The Republic of Mauritius ofMauritius 100.00 100.00 TRC Utility Company Limited To produce and distribute tap water Thailand 99.97 99.97 Olive Technology Company Limited Data management and processing Thailand 49.97 - 49.97 Hydrotek Sahakarn Joint Venture (held by Sahakarn Wisavakorn Xxxxxxxx Xxxxxxxxxx Company Limited) Construction services Thailand 49.00 - 49.00 TRC International Limited (held by TRC Investment Limited) Holding company Hong Kong 100.00 100.00 TRC Middle East LLC (held by TRC International Limited) Construction services Sultanate of Oman 70.00 70.00 TRC Engineering LLC (held by TRC International Limited) Construction services Sultanate of Oman 70.00 70.00 Mahat Company Limited (held by Olive Technology Company Limited) Data management and processing Thailand 59.98 -59.98 SAHAHYDRO PATTAYA Joint Venture (held by Sahakarn Wisavakorn Company Limited) Construction services Thailand 100.00 100.00 2.2 The Company is deemed to have control over an investee or subsidiaries if it has rights, or is exposed, to variable returns from its involvement with the investee, and it has the ability to direct the activities that affect the amount of its returns. 2.3 Subsidiaries are fully consolidated, being the date on which the Company obtains control, and continue to be consolidated until the date when such control ceases. 2.4 The financial statements of the subsidiaries are prepared using the same significant accounting policies as the Company. 2.5 The assets and liabilities in the financial statements of overseas subsidiary companies are translated to Baht using the exchange rate prevailing on the end of reporting period, and revenues and expenses translated using yearly average exchange rates. The resulting differences are shown under the caption of “Exchange differences on translation of financial statements in foreign currency" in the statements of changes in shareholders' equity. 2.6 Material balances and transactions between the Company and its subsidiary companies Group have been eliminated from the consolidated financial statements. 2.7 Non-controlling interests represent the portion of profit or loss and net assets of the subsidiaries that are not held by the Company and are presented separately in the consolidated profit or loss and within equity in the consolidated statement of financial position. 2.8 The separate financial statements present investments in subsidiaries, associate and joint ventures under the cost method.