SERA.12020 Exchange of air-reports
(a) ATS units shall transmit, as soon as practicable, special and non-routine air-reports to:
(1) other aircraft concerned;
(2) the associated meteorological watch office (MWO) in accordance with point 3 of Appendix 5; and
(3) other ATS units concerned.
(b) Transmissions to aircraft shall be repeated at a frequency and continued for a period of time which shall be determined by the ATS unit concerned.