68Use of filtering arrangements in pursuance of an authorisation
(1)This section applies in relation to the use of the filtering arrangements in pursuance of an authorisation.
(2)The filtering arrangements may be used—
(a)to obtain and disclose communications data in pursuance of an authorisation, only if the authorisation specifically authorises the use of the arrangements to obtain and disclose the data,
(b)to process data in pursuance of an authorisation (and to retain the data temporarily for that purpose), only if the authorisation specifically authorises processing data of that description under the arrangements (and their temporary retention for that purpose).
(3)An authorisation must record the designated senior officer’s decision as to—
(a)whether the communications data to be obtained and disclosed in pursuance of the authorisation may be obtained and disclosed by use of the filtering arrangements,
(b)whether the processing of data under the filtering arrangements (and its temporary retention for that purpose) is authorised,
(c)if the processing of data under the filtering arrangements is authorised, the description of data that may be processed.
(4)A designated senior officer must not grant an authorisation which authorises—
(a)use of the filtering arrangements, or
(b)processing under the filtering arrangements,
unless the condition in subsection (5) is met.
(5)The condition is that the designated senior officer (as well as considering that the other requirements of this Part in relation to granting the authorisation are satisfied) considers that what is authorised in relation to the filtering arrangements is proportionate to what is sought to be achieved.