28.—(1) The GB competent authority may—
(a)grant unilateral approvals in respect of designs—
(i)of packages; or
(ii)special form radioactive material,
that originate in Great Britain; and
(b)validate unilateral approvals of such designs made by competent authorities in countries which are not a party to COTIF,
in respect of those matters where RID provides for such approval or validation and the references to which are set out in paragraph 3 of Part 2 of Schedule 3 and subject to the conditions set out in paragraph 5 of Part 2 of Schedule 3.
(2) An approval shall be validated in accordance with paragraph (1) if the conditions in sub-section 6.4.22.6 of RID have been met.
(3) The GB competent authority may grant approvals, as part of a multilateral approval, in respect of—
(a)designs of packages or low dispersible radioactive material or shipments originating in Great Britain; or
(b)shipments which are to be carried by rail in Great Britain,
in respect of those matters where RID makes provision for such approvals and the references to which are set out in paragraph 4 of Part 2 of Schedule 3 subject to the conditions set out in paragraph 5 of Part 2 of Schedule 3.