# The Railways (Interoperability) Regulations 2011, Paragraph 2.2


Energy
(2.2.1) Safety
Operation of the energy-supply systems must not impair the safety either of trains or of persons (users, operating staff, trackside dwellers and third parties).
(2.2.2) Environmental protection
The functioning of the electrical or thermal energy-supply systems must not interfere with the environment beyond the specified limits.
(2.2.3) Technical compatibility
The electricity/thermal energy supply systems used must:
(i)enable trains to achieve the specified performance levels,
(ii)in the case of electricity energy supply systems, be compatible with the collection devices fitted to the trains.

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Source: https://www.legislation.gov.uk/uksi/2011/3066/schedule/2/paragraph/2.2 (the official version)
Page: https://openlegislation.uk/railways-interoperability-regulations-2011/schedule-2/paragraph-2.2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.