1. Service by hand delivery. On the premises of the Office, service of a document may be effected by delivery by hand to the addressee, who shall on delivery acknowledge its receipt. Service shall be deemed to have taken place even if the addressee refuses to accept the document or to acknowledge receipt thereof.
2. Tenderers may submit tenders: - either by post ... - or by hand-delivery to the institution direct or by any agent of the tenderer, including private messenger services.
