Key Personnel 11.1 Each party shall appoint the persons named as such in Schedule 4 as the individuals who shall be responsible for the matters allocated to such Key Personnel. The Key Personnel shall be those people who are identified by each party as being key to the success of the implementation and/or operation of the Services and who shall be retained on the implementation and/or operation of the Services for such time as a person is required to perform the role which has been allocated to the applicable Key Personnel. The Key Personnel shall have the authority to act on behalf of their respective party on the matters for which they are expressed to be responsible. 11.2 The Supplier shall not remove or replace any of the Key Personnel unless: (a) requested to do so by the Authority; (b) the person is on long-term sick leave; (c) the element of the Services in respect of which the individual was engaged has been completed to the Authority's satisfaction; (d) the person resigns from their employment with the Supplier; or (e) the Supplier notifies the Authority within 5 working days of any change. 11.3 The Supplier shall inform the Authority of the identity and background of any replacements for any of the Key Personnel as soon as a suitable replacement has been identified. 11.4 Each party shall ensure that the role of each of its Key Personnel is not vacant (in terms of a permanent representative) for more than 15 consecutive Working Days. Any replacement shall be as, or more qualified and experienced as the previous incumbent and fully competent to carry out the tasks assigned to the Key Personnel whom they have replaced. A temporary replacement shall be identified with immediate effect from the Supplier or the Authority becoming aware of the role becoming vacant. 11.5 The Authority may require the Supplier to remove, or procure the removal of, any of its Key Personnel whom it considers, in its reasonable opinion, to be unsatisfactory for any reason which has a material impact on such person's responsibilities. 11.6 If the Supplier replaces the Key Personnel as a consequence of this clause 11, the cost of effecting such replacement shall be borne by the Supplier.