20.—(1) Evidence of a fact relevant to proceedings conducted under regulation 19 may be given by the production of—
(a)a record produced by a recording device, and
(b)(in the same or another document) a certificate stating the circumstances in which the record was produced, signed by a person authorised to do so by the litter authority which installed the device.
(2) A “recording device” is a camera or other device capable of producing a record of—
(a)the presence of a particular vehicle on the litter authority’s land (within the meaning given by regulation 4(4)), and
(b)the date and time at which the vehicle is present,
and includes any equipment used in conjunction with the camera or other device for the purpose of producing such a record.
(3) A document purporting to be a record or certificate of the kind described in paragraph (1) is to be deemed to be such a record or certificate unless the contrary is proved.