3. In paragraph 2 for the purposes of subparagraph (e) the “applicable date” is—
(a)in the case of a penalty charge notice served by virtue of regulation 10(1)(a) (on the basis of a record produced by an approved device), the last day of the period of 21 days beginning with the date on which the notice was served;
(b)in any other case, the last day of the period of 14 days beginning with that date.