4.—(1) The Secretary of State may create a database of the information received under regulation 3, in accordance with this regulation.
(2) An entry in relation to a relevant vehicle in a database under paragraph (1) must include only—
(a)the name of any licensing authorities with which the relevant vehicle is licensed; and
(b)the information provided under regulation 3 in relation to that vehicle.
(3) The Secretary of State may share the information contained within the database with a licensing authority for the purposes of enforcing measures implemented—
(a)pursuant to plans prepared under—
(i)regulation 26 of the Air Quality Standards Regulations 2010(1); or
(ii)regulation 20 of the Air Quality Standards (Wales) Regulations 2010(2);
(b)by that licensing authority for the purposes of improving air quality in its area.
(4) For the purposes of paragraph (3) a measure implemented jointly by more than one licensing authority is to be treated as having been implemented by each of the participating licensing authorities.