11.8.1 All radio equipment should be of a type
approved by the Administration issuing the licence. Subject to section
11.8.2, such equipment should conform to appropriate performance standards
not inferior to those adopted by the Organization.footnote
11.8.2 Equipment installed prior to 1 February
1992 may be exempted from full compliance with the appropriate performance
standards at the discretion of the Administration, provided that the
equipment is compatible with equipment complying with the performance
standards, having due regard to the criteria which the Organization
may adopt in connection with such standards.