Regulation 8 Modifications
Subject to paragraph (2), a modification to any part of an approved meter shall cause that meter to cease to be an approved meter unless a notification of approval in respect of the pattern or construction of the meter, including that modification, has been issued.
If a person makes a modification to an approved meter—
which does not either itself, or when aggregated with any other modifications to which this paragraph applies, materially affect the operation of the meter; and
within three months of the date upon which the modification is made submits to the Director an application containing the information specified in the Schedule, stating the nature of the modification, and (if so required by the Director) a meter or meters (not exceeding three in total) incorporating the modification or modifications,
the provisions of regulations 5, 6 and 7 shall apply to that application.
A meter to which paragraph (2) applies shall not cease to be an approved meter unless a meter examiner issues a notification under regulation 6 within three months of the date upon which the application under sub-paragraph (b) of paragraph (2) was made.