# The Merchant Shipping (Radiocommunications) (Amendment) Regulations 2021, Paragraph 2

Extent: E+W+S+N.I.

At least once every week—
(a) subject to paragraph 3, the proper operation of the DSC facilities must be tested by means of a test call, when within communication range of a coast station fitted with DSC equipment;
(b) where the reserve source of energy is not a battery (for example, a motor generator), the reserve source of energy must be tested.

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Source: https://www.legislation.gov.uk/uksi/2021/1316/schedule/2/paragraph/2 (the official version)
Page: https://openlegislation.uk/merchant-shipping-radiocommunications-amendment-regulations-2021/schedule-2/paragraph-2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.