12.—(1) This regulation applies to non-designated other airports.
(2) No later than 31st March 2007 the competent authority must—
(a)make a strategic noise map showing the situation in the preceding calendar year for any relevant first round agglomeration; and
(b)submit that map with input data and metadata to the Secretary of State.
(3) No later than 31st March 2012, and thereafter every five years, the competent authority must—
(a)make a strategic noise map showing the situation in the preceding calendar year for any relevant agglomeration; and
(b)submit that map with input data and metadata to the Secretary of State.
(4) From time to time, and whenever a major development occurs affecting the existing noise situation, the competent authority must—
(a)review; and
(b)if necessary revise,
any strategic noise map made pursuant to paragraphs (2) or (3) and adopted pursuant to regulation 23.
(5) The competent authority must submit any strategic noise map revised pursuant to paragraph (4)(b), with input data and metadata, to the Secretary of State within three working days of its revision.
(6) In this regulation—
“relevant first round agglomeration” means a first round agglomeration in which air traffic from the airport results in air traffic noise of—
an Lden value of 55 dB(A) or greater; or
an Lnight value of 50 dB(A) or greater,
anywhere within the first round agglomeration;
“relevant agglomeration” means an agglomeration in which air traffic from the airport results in air traffic noise of—
an Lden value of 55 dB(A) or greater; or
an Lnight value of 50 dB(A) or greater,
anywhere within the agglomeration.