definiens: means whose registered office is at of means ------ has the same meaning as in section 16 of the 1995 Act means the period starting on the date when the Sub - Underlease shall be assigned to the Assignee and terminating on the date when the Assignee is released from the relevant covenants by virtue of the Act means a Sub - Underlease of the Premises dated _ _ _ _ _ _ 199 made between _ _ _ _ _ ( 1 ) and _ _ _ _ _ ( 2 ) and _ _ _ _ _ ( 3 ) means the term of _ _ _ _ _ _ years from and including the _ _ _ _ _ _ 199 created by the Sub - Underlease CONFIDENTIAL TREATMENT REQUESTED BY A VIRON [ I -CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY BRACKETS, IS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2 OF THE SECURITIES ACT OF 1934, AS AMENDED