This part of IEC 61753 specifies the test requirements for wavelength selective cords used in a controlled environment (Category C) according to IEC 61753-1: 2018, where the connectors already comply with the Category C requirements of IEC 61753-1: 2018. The tests selected are a subset of the connector tests from IEC 61753-1: 2018 appropriate for requalification with additional requirements relevant to cords and the connector/cable interface.