55.3 To the extent that any of the data, materials and documents referred to in this Clause are generated by or maintained on a computer or similar system, Sub-hubco shall use all reasonable endeavours to procure for the benefit of the Authority, at no charge or at the lowest reasonable fee, the grant of a licence or sub-licence for any relevant software to enable the Authority or its nominee to access and otherwise use (subject to the payment by the Authority of the relevant fee, if any) such data for such purposes as the Authority may at its sole discretion require. As an alternative, Sub-hubco may provide such data, materials or documents in a format which may be read by software generally available in the market at the relevant time or in hard copy format.
55.4 Sub-hubco shall ensure the back up and storage in safe custody of the data, materials and documents referred to in Clause 55.3 in accordance with Good Industry Practice. Without prejudice to this obligation, Sub-hubco shall submit to the Authority's Representative for approval its proposals for the back up and storage in safe custody of such data, materials and documents and the Authority shall be entitled to object if the same is not in accordance with Good Industry Practice. Sub-hubco shall comply, and shall cause all Sub-hubco Parties to comply, with all procedures to which the Authority's Representative has given its approval. Sub-hubco may vary its procedures for such back-up and storage subject to submitting its proposals for change to the Authority's Representative, who shall be entitled to object on the basis set out above.