Regulations for Recognizing Manufacturing or Installing Capabilities of Refrigeration and Air Conditioning Industries and the Qualifications of Full-Time Technicians and Engineers Article 3

The manufacture or installation experience of a refrigeration and air conditioning enterprise under Paragraph 1, Article 9 of the Act shall be demonstrated by the following supporting documents:1. A sales contract for performing engineering work executed in the past three years that is sufficient to recognize the tonnage of the air conditioning main machine or the horsepower of the refrigeration main machine set forth in the contract.2. A photocopied uniform invoice or account settlement certificate that is sufficient to prove the price of the contracted activity under the preceding Item.3. A delivery receipt, acceptance certificate or completion certificate that is sufficient to prove the completion of the contracted activity under the preceding Item.