Authentication of seal and other documents Authentication of seal and other documents Changes not yet applied. Later legislation changes this provision in ways not yet written into the text below: Sch. 2 para. 10 words substituted by Cromarty Firth Port Authority Harbour Revision 2025 art. 4(4) Sch. 2 para. 19 words substituted by Cromarty Firth Port Authority Harbour Revision 2025 art. 4(4) Sch. 2 para. 20 words substituted by Cromarty Firth Port Authority Harbour Revision 2025 art. 4(4) 19Paragraph 19 20Paragraph 20 Authentication of seal and other documents