When an excavation and grading permit is required by this Chapter or by Chapter 9, the application for the permit shall be reviewed and approved by the City of Medford Building Safety Director or designee. When a permit is required, no grading or excavation shall occur prior to issuance. The permit shall not be issued until a grading plan pursuant to Section 10.728 has been reviewed and approved. Additional supporting data consisting of a soils engineering report and engineering geology report may also be required. The plans and specifications shall be signed and prepared by a registered engineer.