Maintenance, Repair, Remodeling And Structural Alterations. Any non-conforming building or structure may be maintained, repaired, remodeled or structurally altered, provided that any such maintenance, repair, remodeling or structural alteration shall conform to all requirements of the zoning district in which the building or structure is located and shall not increase the non-conformity of the existing building or structure. For buildings located on a lot that does not comply with the applicable lot size requirements of the zoning district, the side yard requirements shall be determined by Section 400.630(A)(2) or Section 400.630(B)(2), whichever is applicable.