(3) This regulation does not apply to an articulated vehicle the semi-trailer of which is– (c) has an overall length that does not exceed the overall length it had on that date. (b) on that date, had an overall length exceeding 12.2m, and (a) was manufactured before the 1st April 1990, (2) This regulation does not apply to an articulated vehicle, the semi-trailer of which– (2) After regulation 13 there shall be inserted– “Turning circle-articulated vehicles other than those incorporating a car transporterġ3A- (1) Subject to paragraphs (2) and (3), this regulation applies to an articulated vehicle having an overall length exceeding 15. 5.-(1) For the heading preceding regulation 13 there shall be substituted– “Turning circle-buses ”.