# The Uncertificated Securities Regulations 2001, Paragraph 21


(1) Subject to subparagraphs (2) to (5), a relevant system must comprise procedures which provide that an Operator only registers a transfer of title to uncertificated units of a security or generates an Operator-instruction requiring a participating issuer to register such a transfer, and only generates an Operator-instruction informing a settlement bank of its payment obligations in respect of such a transfer, if—
(a) it has—
(i) received a system-member instruction which is attributable to the transferor; or
(ii) been required to do so by a court in the United Kingdom or by or under an enactment;
(b) it has—
(i) established that the transferor has title to such number of units as is in aggregate at least equal to the number to be transferred; or
(ii) established that the transfer is one of two or more transfers which may be registered in accordance with regulation 30(2);
(c) in the case of a transfer to a system-member for value, it has established that a settlement bank has agreed to make payment in respect of the transfer, whether alone or taken together with another transfer for value; and
(d) the transfer is not in excess of any limit which by virtue of paragraph 15(a)(ii) the transferor has set on an authority given by him to a sponsoring system-participant.
(2) Subparagraph (1)(a) shall not prevent the registration by an Operator of a transfer of title to uncertificated units of a security, or the generation of an Operator-instruction, in accordance with procedures agreed between the Operator and the transferor to enable the transfer by means of a relevant system of uncertificated units of a security provided that such transfer is for the purpose of, or relates to, facilitating the provision of financial credit or financial liquidity to the transferor by a settlement bank, the Bank of England, the European Central Bank, any other central bank, or any other body having functions as a monetary authority.
(3) A relevant system must comprise procedures which provide that—
(a) the Operator may amend an Operator register of securities; and
(b) an Operator-instruction requiring a participating issuer to register a transfer of uncertificated units of a security, or informing a settlement bank of its payment obligations in respect of such a transfer, may be generated,
if necessary to correct an error and if in accordance with the rules made and practices instituted by the Operator in order to comply with this Schedule.
(4) A relevant system must comprise procedures which provide that—
(a) the Operator may amend an Operator register of securities; and
(b) an Operator-instruction requiring a participating issuer to register a transfer of units of a wholly dematerialised security, or informing a settlement bank of its payment obligations in respect of such a transfer, may be generated,
if necessary to effect a transfer of such units, on the termination of participation in the relevant system by the system-member by whom those units are held and if in accordance with the rules made and practices instituted by the Operator in order to comply with this Schedule, to a person nominated under the Operator’s rules.
(5) Subparagraph (1)(a) shall not prevent the registration by an Operator of a transfer of title to uncertificated units of a security, or the generation of an Operator-instruction, in order to give effect to the procedures referred to in subparagraph (3) or (4).

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Source: https://www.legislation.gov.uk/ukdsi/2001/0110387449/schedule/1/paragraph/21 (the official version)
Page: https://openlegislation.uk/draft-uncertificated-securities-regulations-2001/schedule-1/paragraph-21
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.