11.—(1) This regulation applies to non-designated major airports.
(2) No later than 31st March 2007, and thereafter every five years, the competent authority must—
(a)make a strategic noise map showing the situation in the preceding calendar year for the airport; and
(b)submit that map with input data and metadata to the Secretary of State.
(3) 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 paragraph (2) and adopted pursuant to regulation 23.
(4) The competent authority must submit any strategic noise map revised pursuant to paragraph (3)(b), with input data and metadata, to the Secretary of State within three working days of its revision.