In this subpart, unless the context otherwise requires,—
election advertisement has the meaning given to it by section 5
election expense has the meaning given to it by section 114
publish has the meaning given to it by section 4
third party activity, in relation to a third party, means an activity—
(a) that is undertaken by, or with the authority of,—
(i) the third party; or
(ii) the third party's financial agent; and
(b) that constitutes publishing an election advertisement in any form (for example, in the form of a radio or television broadcast, notice, poster, pamphlet, billboard, or electronic message); and
(c) that is undertaken, or deemed by section 119 to have been undertaken, during the regulated period.