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Section P-302 New Materials, Fixtures and Methods
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No material, device, fixture, method of assemblage, installation, appurtenance or appliance, other than those specified or permitted by this code, shall be installed unless it has been approved by the Department and is in conformity with the conditions of such approval.
When deemed impractical to conduct adequate tests prior to installation, the Department is authorized to grant tentative approval and permission to make installation as proposed. Final approval shall not be given until tests conducted after installation show that the material, device, fixture, method of assemblage, installation, appurtenance or appliance meets the intent of this code, functions as required, and conforms to the conditions of approval set forth by the Department.