Common use of COMMITMENTS AND CONTINGENT LIABILITIES Clause in Contracts

COMMITMENTS AND CONTINGENT LIABILITIES. 33.1 Purchase construction materials and subcontracted work commitments As at December 31, 2022, the Group have outstanding commitments of Baht 3,734 million and USD 1 million in respect of purchase construction materials and subcontracted work (the Company only: Baht 391 million and USD 1 million ) (December 31, 2021 : Baht 4,944 million and USD 1 million in respect of purchase construction materials and subcontracted work (the Company only: Baht 407 million and USD 1 million )). 33.2 Operating lease commitments The Group have entered into lease agreements in respect of the lease of land, machines, motor vehicles and equipment. The terms of the agreements are generally between 1 and 5 years. Future minimum lease payments required under these non-cancellable operating lease contracts were as follows. Payable : In up to 1 year 4 3 2 1 In over 1 and up to 5 years - - - - 33.3 Service agreement commitments The Group have entered into service agreements in respect of the consultant and security. The terms of the agreements are generally between 1 and 2 years. Future minimum lease payments required under these non-cancellable operating leases contracts were as follows. Payable : In up to 1 year 1 1 1 1 33.4 Bank guarantees As at December 31, 2022 and 2021, bank guarantees issued by banks on behalf of the Group in respect of certain performance bonds as required in the normal course of business were as follows. Consolidated financial statements Separate financial statements As at December 31, As at December 31, 2022 2021 2022 2021 Guarantee of construction contract and bidding 1,330 1,372 424 421 Guarantee of advance payment bond and retention 1,511 1,682 192 194 Guarantee of others 153 187 108 118 Total 2,994 3,241 724 733 As at December 31, 2022, the Group had the obligations from related parties to use the letter of guarantee of the Group amounted Baht 341 million (December 31, 2021 : Baht 337 million).

COMMITMENTS AND CONTINGENT LIABILITIES. 33.1 23.1 Purchase construction materials and subcontracted work commitments As at December March 31, 2022, the Group have outstanding commitments of Baht 3,734 4,742 million and USD 1 million million, in respect of purchase construction materials and subcontracted work (the Company only: Baht 391 439 million and USD 1 million million) (December 31, 2021 : Baht 4,944 million and USD 1 million in respect of purchase construction materials and subcontracted work million, (the Company only: Baht 407 million and USD 1 million million)). 33.2 23.2 Operating lease commitments The Group have entered into lease agreements in respect of the lease of land, machines, motor vehicles and equipment. The terms of the agreements are generally between 1 and 5 years. Future minimum lease payments required under these non-cancellable operating lease contracts were as follows. Consolidated financial statements Separate financial statements As at March As at December As at March As at December 31, 2022 31, 2021 31, 2022 31, 2021 Payable : In up to 1 year 4 3 2 3 1 1 In over 1 and up to 5 years - 1 - - - 33.3 23.3 Service agreement commitments The Group have entered into service agreements in respect of the consultant and security. The terms of the agreements are generally between 1 and 2 years. Future minimum lease payments required under these non-cancellable operating leases contracts were as follows. Consolidated financial statements Separate financial statements As at March As at December As at March As at December 31, 2022 31, 2021 31, 2022 31, 2021 Payable : In up to 1 year 2 1 1 1 2 1 33.4 23.4 Bank guarantees As at December March 31, 2022 and December 31, 2021, bank guarantees issued by banks on behalf of the Group in respect of certain performance bonds as required in the normal course of business were as follows. In Million Baht Consolidated financial statements Separate financial statements As at December March 31, 2022 As at December 31, 2021 As at March 31, 2022 2021 2022 As at December 31, 2021 Guarantee of construction contract and bidding 1,330 1,345 1,372 424 433 421 Guarantee of advance payment bond and retention 1,511 1,492 1,682 192 149 194 Guarantee of others 153 200 187 108 133 118 Total 2,994 3,037 3,241 724 715 733 As at December March 31, 2022, the Group had the obligations from related parties to use the letter of guarantee of the Group amounted Baht 341 338 million (December 31, 2021 : Baht 337 million).

COMMITMENTS AND CONTINGENT LIABILITIES. 33.1 23.1 Purchase construction materials and subcontracted work commitments As at December March 31, 20222023, the Group have outstanding commitments of Baht 3,734 3,539 million and USD 1 million million, in respect of purchase construction materials and subcontracted work (the Company only: Baht 391 357 million and USD 1 million million) (December 31, 2021 2022 : Baht 4,944 3,734 million and USD 1 million in respect of purchase construction materials and subcontracted work million, (the Company only: Baht 407 391 million and USD 1 million million)). 33.2 23.2 Operating lease commitments The Group have entered into lease agreements in respect of the lease of land, machines, motor vehicles and equipment. The terms of the agreements are generally between 1 and 5 years. Future minimum lease payments required under these non-cancellable operating lease contracts were as follows. Consolidated financial statements Separate financial statements As at March As at December As at March As at December 31, 2023 31, 2022 31, 2023 31, 2022 Payable : In up to 1 year 4 3 4 2 1 In over 1 and up to 5 years - - - -2 33.3 23.3 Service agreement commitments The Group have entered into service agreements in respect of the consultant and security. The terms of the agreements are generally between 1 and 2 years. Future minimum lease payments required under these non-cancellable operating leases contracts were as follows. Consolidated financial statements Separate financial statements As at March As at December As at March As at December 31, 2023 31, 2022 31, 2023 31, 2022 Payable : In up to 1 year 2 1 1 1 2 1 33.4 23.4 Bank guarantees As at March 31, 2023 and December 31, 2022 and 20212022, bank guarantees issued by banks on behalf of the Group in respect of certain performance bonds as required in the normal course of business were as follows. In Million Baht Consolidated financial statements Separate financial statements As at December March 31, 2023 As at December 31, 2022 2021 As at March 31, 2023 As at December 31, 2022 2021 Guarantee of construction contract and bidding 1,135 1,330 1,372 284 424 421 Guarantee of advance payment bond and retention 1,697 1,511 1,682 347 192 194 Guarantee of others 133 153 187 88 108 118 Total 2,965 2,994 3,241 719 724 733 As at December March 31, 20222023, the Group had the obligations from related parties to use the letter of guarantee of the Group amounted Baht 341 362 million (December 31, 2021 2022 : Baht 337 341 million).

COMMITMENTS AND CONTINGENT LIABILITIES. 33.1 24.1 Purchase construction materials and subcontracted work commitments As at December 31September 30, 20222021, the Group have outstanding commitments of Baht 3,734 4,698 million and USD 1 million million, in respect of purchase construction materials and subcontracted work (the Company only: Baht 391 419 million and USD 1 million million) (December 31, 2021 2020 : Baht 4,944 million and USD 1 million in respect of purchase construction materials and subcontracted work 4,898 million, (the Company only: Baht 407 million and USD 1 million 630 million)). 33.2 24.2 Operating lease commitments The Group have entered into lease agreements in respect of the lease of land, machines, motor vehicles and equipment. The terms of the agreements are generally between 1 and 5 years. Future minimum lease payments required under these non-cancellable operating lease contracts were as follows. follows.‌‌ Consolidated financial statements Separate financial statements As at September As at December As at September As at December 30, 2021 31, 2020 30, 2021 31, 2020 Payable : In up to 1 year 3 4 1 3 2 1 In over 1 and up to 5 years - - - - 33.3 24.3 Service agreement commitments The Group have entered into service agreements in respect of the consultant and security. The terms of the agreements are generally between 1 and 2 years. Future minimum lease payments required under these non-cancellable operating leases contracts were as follows. Consolidated financial statements Separate financial statements As at September As at December As at September As at December 30, 2021 31, 2020 30, 2021 31, 2020 Payable : In up to 1 year 1 1 2 1 1 33.4 24.4 Bank guarantees As at September 30, 2021 and as at December 31, 2022 and 20212020, bank guarantees issued by banks on behalf of the Group in respect of certain performance bonds as required in the normal course of business were as follows. In Million Baht Consolidated financial statements Financial Statements Separate financial statements Financial Statements As at September 30, 2021 As at December 31, 2020 As at September 30, 2021 As at December 31, 2022 2021 2022 2021 2020 Guarantee of construction contract and bidding 1,330 1,372 424 421 1,415 1,219 461 359 Guarantee of advance payment bond and retention 1,511 1,682 192 1,652 2,111 194 826 Guarantee of others 153 187 108 118 181 68 117 45 Total 2,994 3,241 724 733 3,248 3,398 772 1,230 As at December 31September 30, 20222021, the Group had have the obligations from related parties to use the letter of guarantee of the Group amounted Baht 341 383 million (December 31, 2021 2020 : Baht 337 282 million).‌‌ 24.5 Guarantees (a) As at September 30, 2021, the Company has commitments from guarantee of credit facilities of the subsidiary amounting to Baht 995 million (December 31, 2020 : Baht 995 million) (b) As at September 30, 2021, the Group have commitment from cross guarantee of credit facilities of the Group amounting to Baht 3,230 million (December 31, 2020 : Baht 3,230 million).

COMMITMENTS AND CONTINGENT LIABILITIES. 33.1 24.1 Purchase construction materials and subcontracted work commitments As at December March 31, 20222021, the Group Company and the subsidiary have outstanding commitments of Baht 3,734 million and USD 1 million 5,131 million, in respect of purchase construction materials and subcontracted work (the Company only: Baht 391 million and USD 1 million 675 million) (December 31, 2021 2020 : Baht 4,944 million and USD 1 million in respect of purchase construction materials and subcontracted work 4,898 million, (the Company only: Baht 407 million and USD 1 million 630 million)). 33.2 24.2 Operating lease commitments The Group Company and its subsidiary have entered into lease agreements in respect of the lease of land, machines, motor vehicles and equipment. The terms of the agreements are generally between 1 and 5 years. Future minimum lease payments required under these non-cancellable operating lease contracts were as follows. Consolidated financial statements Separate financial statements As at March As at December As at March As at December 31, 2021 31, 2020 31, 2021 31, 2020 Payable : In up to 1 year 4 4 3 2 1 3 In over 1 and up to 5 years - - - - 33.3 24.3 Service agreement commitments The Group Company and its subsidiary have entered into service agreements in respect of the consultant and security. The terms of the agreements are generally between 1 and 2 years. Future minimum lease payments required under these non-cancellable operating leases contracts were as follows. Consolidated financial statements Separate financial statements As at March As at December As at March As at December 31, 2021 31, 2020 31, 2021 31, 2020 Payable : In up to 1 year 1 1 1 2 2 2 1 33.4 24.4 Bank guarantees As at March 31, 2021 and December 31, 2022 and 20212020, bank guarantees issued by banks on behalf of the Group Company and the subsidiary in respect of certain performance bonds as required in the normal course of business were as follows. In Million Baht Consolidated financial statements Separate financial statements As at December March 31, 2021 As at December 31, 2022 2020 As at March 31, 2021 2022 2021 As at December 31, 2020 Guarantee of construction contract and bidding 1,330 1,372 424 421 1,247 1,219 389 359 Guarantee of advance payment bond and retention 1,511 1,682 192 194 1,634 2,111 272 826 Guarantee of others 153 187 108 118 102 68 28 45 Total 2,994 3,241 724 733 2,983 3,398 689 1,230 As at December March 31, 20222021, the Group Company and its subsidiaries had the obligations from related parties to use the letter of guarantee of the Group Company and its subsidiaries amounted Baht 341 383 million (December 31, 2021 2020 : Baht 337 282 million).

COMMITMENTS AND CONTINGENT LIABILITIES. 33.1 24.1 Purchase construction materials and subcontracted work commitments As at December 31June 30, 20222021, the Group have outstanding commitments of Baht 3,734 5,118 million and USD 1 million million, in respect of purchase construction materials and subcontracted work (the Company only: Baht 391 495 million and USD 1 million million) (December 31, 2021 2020 : Baht 4,944 million and USD 1 million in respect of purchase construction materials and subcontracted work 4,898 million, (the Company only: Baht 407 million and USD 1 million 630 million)). 33.2 24.2 Operating lease commitments The Group have entered into lease agreements in respect of the lease of land, machines, motor vehicles and equipment. The terms of the agreements are generally between 1 and 5 years. Future minimum lease payments required under these non-cancellable operating lease contracts were as follows. Consolidated financial statements Separate financial statements As at June As at December As at June As at December 30, 2021 31, 2020 30, 2021 31, 2020 Payable : In up to 1 year 3 4 2 3 2 1 In over 1 and up to 5 years - - - - 33.3 24.3 Service agreement commitments The Group have entered into service agreements in respect of the consultant and security. The terms of the agreements are generally between 1 and 2 years. Future minimum lease payments required under these non-cancellable operating leases contracts were as follows. Consolidated financial statements Separate financial statements As at June As at December As at June As at December 30, 2021 31, 2020 30, 2021 31, 2020 Payable : In up to 1 year 1 1 1 5 2 2 1 33.4 24.4 Bank guarantees As at June 30, 2021 and as at December 31, 2022 and 20212020, bank guarantees issued by banks on behalf of the Group in respect of certain performance bonds as required in the normal course of business were as follows. In Million Baht Consolidated financial statements Financial Statements Separate financial statements Financial Statements As at June 30, 2021 As at December 31, 2020 As at June 30, 2021 As at December 31, 2022 2021 2022 2021 2020 Guarantee of construction contract and bidding 1,330 1,372 424 421 1,348 1,219 457 359 Guarantee of advance payment bond and retention 1,511 1,682 192 194 1,612 2,111 320 826 Guarantee of others 153 187 108 118 209 68 119 45 Total 2,994 3,241 724 733 3,169 3,398 896 1,230 As at December 31June 30, 20222021, the Group had have the obligations from related parties to use the letter of guarantee of the Group amounted Baht 341 383 million (December 31, 2021 2020 : Baht 337 282 million).