K.3 For the purposes of Class K, “relevant period” means the period elapsing—
(a)where a direction is not issued under article 5, 28 days after the notification referred to in paragraph K.1(b) or, if earlier, on the date on which the mineral planning authority notify the developer in writing that they will not issue such a direction, or
(b)where a direction is issued under article 5, 28 days from the date on which notice of that decision is sent to the Secretary of State, or, if earlier, the date on which the mineral planning authority notify the developer that the Secretary of State has disallowed the direction.