The competent authority shall prepare a refrigeration and air conditioning enterprise directory containing the following particulars:
1. The name, gender, date of birth, ID no., address, education and work experience of the responsible person of the refrigeration and air conditioning enterprise.
2. The refrigeration and air conditioning enterprise's registration certificate number.
3. The territory where the enterprise operates.
4. The name, address and telephone number of the enterprise.
5. Other required matters.

Refrigeration and air conditioning enterprises are categorized under Superfine Class or Class A, B or C for meeting the following requirements:
1. A superfine refrigeration and air conditioning enterprise:
(1) Having a registered capital of more than NT$20,000,000.
(2) Having the experience or capability to manufacture or install an air conditioning system of more than 1,000 tons or refrigeration engineering work of more than 500 horsepower.
(3) Employing at least one full-time engineer, one Class A technician, two Class B technicians, and three Class C technicians.
2. A Class A refrigeration and air conditioning enterprise:
(1) Having a registered capital of more than NT$10,000,000.
(2) Having the experience or capability to manufacture or install an air conditioning system of more than 500 tons but less than 1,000 tons or refrigeration engineering work of more than 200 horsepower but less than 500 horsepower.
(3) Employing at least one Class A technician, two Class B technicians, and three Class C technicians.
3. A Class B refrigeration and air conditioning enterprise:
(1) Having a registered capital of more than NT$5,000,000.
(2) Having the experience or capability to manufacture or install an air conditioning system of more than 100 tons but less than 500 tons or refrigeration engineering work of more than 50 horsepower.
(3) Employing at least one Class A technician, one Class B technician, and two Class C technicians.
4. A Class C refrigeration and air conditioning enterprise:
(1) Having a registered capital of more than NT$2,000,000.
(2) Having the experience or capability to manufacture or install an air conditioning system of less than 100 tons or refrigeration engineering work of less than 50 horsepower.
(3) Employing at least one Class B technician and one Class C technician.
A full-time engineer may perform the work of a Class A technician, a Class A technician may perform the work of a Class B or Class C technician, and a Class B technician may perform the work of a Class C technician. The experience and capability and the qualifications of full-time technicians and engineers under the preceding Paragraph shall be recognized by the method prescribed by the central competent authority.
A Class C refrigeration and air conditioning enterprise may apply for change of its registration certificate to a Class B refrigeration and air conditioning enterprise registration certificate only after having manufactured or installed air conditioning systems totaling more than 100 tons or refrigeration engineering work totaling more than 50 horsepower for more than one year. A Class B refrigeration and air conditioning enterprise may apply for change of its registration certificate to a Class A refrigeration and air conditioning enterprise registration certificate only after having manufactured or installed air conditioning systems totaling more than 500 tons or refrigeration engineering work totaling more than 200 horsepower for more than two years. A Class A refrigeration and air conditioning enterprise may apply for change of its registration certificate to a superfine refrigeration and air conditioning enterprise registration certificate only after having manufactured or installed air conditioning systems totaling more than 1,000 tons or refrigeration engineering work totaling more than 500 horsepower for more than three years.

After a refrigeration and air conditioning enterprise's permit application passes the review of the competent authority, the authority shall issue a registration certificate to the enterprise, publish the particulars of the registration, and give a notice thereof to the refrigeration and air conditioning engineering industrial board of trade.
A refrigeration and air conditioning enterprise registration certificate shall be valid for a period of five years. Three months prior to the expiration of its registration certificate, a refrigeration and air conditioning enterprise shall apply to the competent authority for renewal of its registration as well as issuance of a new registration certificate. If no application for renewal is filed or the renewal application is not approved, the original registration certificate shall become invalid upon the expiration of the registration term.
The items subject to review for renewal application under the preceding Paragraph are the matters set forth in the application documents as well as proof that taxes have been paid for the most recent period.

If a refrigeration and air conditioning enterprise suspends business, its registration certificate shall be turned in to the competent authority for filing and recording and shall be returned upon application for resumption of operations.
The period of suspension under the preceding Paragraph shall not exceed one year; otherwise, its registration certificate shall be rescinded, provided that the suspension may be extended for one year after the central competent authority approves an application for extension.
To close down or be dissolved, a refrigeration and air conditioning enterprise shall file a completed application form together with its registration certificate to the competent authority for registration of rescission.

If a refrigeration and air conditioning enterprise suspends or resumes business or there is any alteration in its original registered particulars, it shall file a report within 30 days from the date of occurrence of the facts with the authority that registered the original particulars.
The provisions of Paragraph 1, Article 10 shall apply mutatis mutandis to the circumstances in the preceding Paragraph.

A refrigeration and air conditioning enterprise whose business registration is rescinded or that suspends operations or voluntarily petitions for suspension of business shall cease operating a refrigeration and air conditioning business from the day after the authority's decision or notice is served. Nevertheless, if the enterprise has started work on but has yet to complete an engineering project, the central competent authority may allow the enterprise to continue the work until the work is completed.

The central competent authority may, depending on the situation, conduct workshops or educational training courses for full-time technicians. Full-time technicians of refrigeration and air conditioning enterprises shall attend training courses or workshops on technical specifications within the time limits set forth in the central competent authority's notices. If a technician fails any training or workshop, the central competent authority may notify him/her to attend the training or workshop again.
The guidelines for enforcing the provisions of the preceding Paragraph shall be prescribed by the central competent authority.