A-203.1 Approved materials and equipment: All materials, equipment and devices approved by the code official shall be constructed and installed in accordance with such approval.

A-203.2 Used materials and equipment: Used materials, equipment and devices shall not be reused unless they have been reconditioned and placed in good and proper working condition and approved by the code official.

A-203.3 Alternative materials and equipment: The provisions of the technical codes are not intended to prevent the installation of any material or method of construction not specifically prescribed by the technical codes, provided that any such alternative has been reviewed and approved. The Commissioner is authorized to approve an alternative material or method of construction upon favorable recommendation of the Board of Building Standards (Board of Safety and Fire Prevention for matters exclusive to the Fire Prevention Code) when he or she finds that the proposed design is satisfactory and complies with the intent of the provisions of the technical codes, and that the material, method or work offered is, for the purpose intended, at least the equivalent of that prescribed in the technical codes in quality, strength, effectiveness, fire resistance, durability and safety.

A-203.3.1 Research and investigation: Sufficient technical data shall be submitted to substantiate the proposed installation of any material or assembly. If it is determined that the evidence submitted is satisfactory proof of performance for the proposed installation, the code official shall approve such alternative subject to the requirements of the technical codes. The cost of all tests, reports and investigations required under these provisions shall be paid by the applicant.

A-203.3.2 Research reports: Supporting data, where necessary to assist in the approval of materials or assemblies not specifically provided for in the technical codes, shall consist of valid research reports from approved sources.