The relevant period for the purposes of section 86(3) of the 1995 Act shall be, in relation to the preparation of an action plan to which that section applies, the period of 9 months beginning with the date on which the district council preparing the action plan first consults the relevant county council in relation to the plan pursuant to paragraph 1(2)(e) of Schedule 11 to the 1995 Act.

The relevant period for the purposes of any other provision of Part IV of the 1995 Act3 shall be, in relation to an air quality objective, the period beginning with the date on which these Regulations come into force and ending on the date set out in the third column of the Table in the Schedule which relates to that objective.