# The Town and Country Planning (General Permitted Development) Order 1995, Paragraph B.3


B.3 The relevant size criteria for the purposes of paragraph B.1(d) are that—
(a) only one of the antennas may exceed 60 centimetres in length; and
(b) any antenna which exceeds 60 centimetres in length must not exceed 100 centimetres in length.

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Source: https://www.legislation.gov.uk/uksi/1995/418/schedule/2/part/25/crossheading/class-b/paragraph/B.3 (the official version)
Page: https://openlegislation.uk/town-and-country-planning-general-permitted-development-order-1995/schedule-2/part-25/crossheading-class-b/paragraph-B.3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.