Regulation 15 Periodic checks to maintain validity of certificate
The holder of a train driving certificate must pass periodic language and specific professional knowledge tests or examinations meeting the requirements described in regulation 9(3) and (4), and periodic tests relating to their employer's safety management system.
For the purpose of paragraph (1), the frequency of periodic tests and examinations must be as determined by the railway undertaking or infrastructure manager that issued the certificate in accordance with its safety management system, but must not be less than the minimum frequencies set out in Schedule 6.
When the holder of a train driving certificate passes the tests and examinations required by paragraph (1) the certificate must be endorsed with a statement to that effect by the railway undertaking or infrastructure manager that issued it.