43. In article 99—
(a)for paragraph (1) substitute—
“(1) This article applies to a rocket of which the total impulse of the motor or combination of motors exceeds 160 Newton-seconds.”;
(b)omit paragraph (2);
(c)for paragraph (3) substitute—
“(3) No person shall launch a rocket to which this article applies unless—
(a)he has the prior permission of the DCA; and
(b)he acts in accordance with any conditions subject to which the permission was granted.”;
(d)omit paragraphs (4) to (6).