(c) submit any additional information required by the Commission, including details of the times, places and other particulars of the measurements, as the Commission may from time to time direct; and (d) Retain all quality of service data, including all measurements and related records, for a minimum of twelve months after the reporting period or as the Commission may, from time to time, direct. 17. Inspections and investigations. The Commission may inspect or investigate matters relating to the measurement of quality of service, of a licensee from time to time to ensure compliance. 18. Publication of reports on measurements of quality of service. The Commission may publish measurement results or the quality of service reports submitted by licensees. 19. Telecommunications contractors. (1) The Commission shall, before issuing a licence to a telecommunications contractor under these Regulations, consider— (a) The applicant’s ability to conduct the business; and (b) The competence of the technical staff undertaking to its works. (2) A telecommunications contractor shall, when undertaking works ensure, that the work complies with guidelines issued by the Commission from time to time and any other internationally acceptable standards prevailing. (3)The Commission may revoke the licence of a telecommunications contractor who contravenes paragraph (2). 20. Approvals from other authorities. Notwithstanding that a licence has been issued by the Commission, a licensee shall bear the responsibility of obtaining the approvals of other Government agencies, local authorities or other relevant authorities that may be required for the provision of the licensed services, installation, placement, laying or maintenance of any facilities on, through, under or across any land. 21. Duty of care.