16.—(1) An enforcing authority may give (whether or not at the same time)—
(a)an enforcement notice, and
(b)a civil penalty notice,
to the same person in respect of the same failure to comply with a relevant provision.
(2) An enforcing authority must not (except in the circumstances described in paragraph (3)) give a civil penalty notice under regulation 10(3) to the same person more than once for the same failure.
(3) If a civil penalty notice is given to a person under regulation 10(3) but subsequently withdrawn, the enforcing authority may give a further civil penalty notice to the person for the failure described in the original notice.
(4) An enforcing authority must not (except in the circumstances described in paragraph (5)) give a civil penalty notice under regulation 10(4) to the same person more than once for the same failure.
(5) If a civil penalty notice is given to a person under regulation 10(4) but subsequently withdrawn, the enforcing authority may give a further civil penalty notice to the person for the failure described in the original notice.