5.3.1 The minimum amount of data items to be recorded
by the VDR is specified in 5.5. Optionally, additional items may be
recorded provided that the requirements for the recording and storage
of the specified selections are not compromised.
5.3.2 The equipment should be so designed that,
as far as is practical, it is not possible to manipulate the amount
of data being recorded by the VDR, the data itself nor the data which
has already been recorded. Any attempt to interfere with the integrity
of the data or the recording should be recorded.
5.3.3 The recording method should be such that
each item of the recorded data is checked for integrity and an alarm
given if a non-correctable error is detected.