4. The alteration, extension, removal or relocation of any apparatus shall not be implemented until—
(a)any requirement for any permits under the Environmental Permitting (England and Wales) Regulations 2010 or other legislation and any other associated consents are obtained, and any approval or agreement required from Anglian Water on alternative outfall locations as a result of such relocation are approved, such approvals from Anglian Water not to be unreasonably withheld or delayed; and
(b)the undertaker has made the appropriate application required under the Water Industry Act 1991 together with a plan and section of the works proposed and Anglian Water has agreed all of the contractual documentation required under the Water Industry Act 1991, such agreement not to be unreasonably withheld or delayed; and such works to be executed only in accordance with the plan, section and description submitted and in accordance with such reasonable requirements as may be made by Anglian Water for the alteration or otherwise for the protection of the apparatus, or for securing access to it.