6.4 Should control measures or steps initiated
on the basis of evidence or information received from other sources
fail to establish non-compliance, the Contracting Government should
evaluate the use of such sources, the motives these sources may have
for providing misleading information, and determine whether or not
information received from these sources should continue to be considered
as 'reliable'. In cases of clear abuse the Contracting Government
should consider further action aimed at curtailing similar instances,
possibly co-ordinated with the Administration or the ship, if appropriate.