304.11.1 Required Inspections:​ All buildings and structures except Use Group R-3, shall be inspected by a licensed professional engineer or registered architect to determine the structural soundness of items covered in Sections 304.6, 304.8, 304.9, 304.10 and 304.11, and their reports shall bear their signature and seal. All inspections made prior to the adoption of this code shall continue on their previous schedule at five year intervals. All new inspections shall be completed within one year of the adoption of this code and successive inspections shall be made every fifth year after the date of the original inspection.​​