The Telecommunications (Licence Modification)(Standard Schedules) Regulations 1999

5.3  No apparatus or system is required under paragraph 5.1 to be, or to be permitted to be, connected or kept connected to the Applicable Systems if that apparatus, or any apparatus comprised in that system, as the case may be:

(a) conformed to the relevant standard or standards at the time when the connection to the Applicable Systems was made but no longer does so and does not conform to the relevant standard or standards (if any) for the time being designated under section 22(6) of the Act;

(b) was at the time when the connection to the Applicable Systems was made but has since ceased to be Compliant Terminal Equipment; or

(c) while continuing to conform to the relevant standard is in the opinion of the Licensee liable to cause the death of, or personal injury to, or damage to the property of, the Licensee, or any person engaged in the running of the Applicable Systems or materially to impair the quality of any telecommunication service provided by means of the Applicable Systems and the Director has not expressed a contrary opinion.