When applying for the alteration inspection of boilers, the Manufacturer shall fill the Application for Alteration Inspection of boilers (Annex 43) and submit it the documents as shown below.1. Qualification certificate of the type inspection of the manufacturing equipment.2. 2 copies of specification of the boiler3. Drawings of the altered parts.4. Detailed structure drawing and strength calculation sheet, each 2 copies. However, this may be ignored if the inspecting organization deems it unnecessary.5. Aforesaid certificates for qualification of inspections or their photocopies.Stipulations of Paragraph 3 of Article 73 and Article 79 shall apply to the alteration inspection.