4.—(1) A public undertaking shall retain the records which are required to be maintained under regulation 3(1) from the time that the public funds are provided until a period of five years has elapsed from the last day of the financial year in which the public funds were last used.
(2) A public undertaking shall retain the records which are required to be maintained under regulation 3(4) from the time that the public funds are used until a period of five years has elapsed from the last day of the financial year in which the public funds were last used.