(1) If, before the commencement of this instrument, the Secretary decided under regulation 20 of the Defence Home Ownership Assistance Scheme Regulations 2008 to treat particular se rvice by a person as effective service, then, on th at commencement , the Secretary is taken to have made a determination under section 17 of this instrument specifying the service as service that is to be treated as effective service.
(2) To avoid doubt, the Secretary may vary or revoke a determination that is taken to have been made under subsection ( 1).