found this:
4 PHRASEOLOGY TO BE USED IN AIRSPACE WHERE 8.33 kHz CHANNEL
SPACING IS USED
NOTE: The following paragraphs have been extacted from Doc. 7030, Regional Supplementary
Procedures and apply to all aircraft operating above FL 245 in the European region
CIRCUMSTANCES PHRASEOLOGIES (Pilot Transmission in Bold Type)
4.2.1 (Reference Part X, 4.3.1)
...to request the capability of the radio ADVISE EIGHT POINT THREE THREE EQUIPED
equipment
...to indicate 8.33 kHz capability AFFIRM EIGHT POINT THREE THREE
...to indicate lack of 8.33 kHz capability NEGATIVE EIGHT POINT THREE THREE
...to indicate UHF capability UHF EQUIPED
...to request the status ADVISE EIGHT POINT THREE THREE
in respect of exemption EXEMPTED STATUS
...to indicate 8.33 kHz exempted status (aircraft call sign) EXEMPTED EIGHT
POINT THREE THREE
...to indicate that a certain clearance is (clearance / instruction) DUE EIGHT POINT THREE
given because otherwise a THREE REQUIREMENT
non-equipped aircraft would enter
the airspace of mandatory carriage