# The Railways (Interoperability) Regulations 2011, Paragraph 1.5


Technical compatibility
The technical characteristics of the infrastructure and fixed installations must be compatible with each other and with those of the trains to be used on the rail system.
If compliance with these characteristics proves difficult on certain sections of the network, temporary solutions, which ensure compatibility in the future, may be implemented.

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Source: https://www.legislation.gov.uk/uksi/2011/3066/schedule/2/paragraph/1.5 (the official version)
Page: https://openlegislation.uk/railways-interoperability-regulations-2011/schedule-2/paragraph-1.5
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.