Where a building or part of it described in the Table is designed by an architect or a PEO licensee or a combination of both, all plans, sketches, drawings, graphic representations, specifications and other documents that are prepared by an architect, PEO licensee or both and that form the basis for the issuance of a permit under section 8 of the Building Code Act or any changes to it authorized by the Chief Building Official shall bear the signature and seal of the architect, PEO licensee or both, as applicable