ART21 – 61 – 19.108 B − Maritime identification digits (MIDs) MOD 19.108A § 41 The maritime identification digits M1I2D3 are an integral part of the maritime mobile service identity and denote, in principle, the administration responsible for the station so identified. In some cases, M1I2D3 may denote a geographical area under the responsibility of a specific administration. Furthermore, as indicated in the most recent version of Recommendation ITU-R M.585, some maritime identification digits are reserved for maritime devices and do not correspond either to an administration or to a geographical area. (WRC-15) 19.110 C − Maritime mobile service identities (WRC-07)MOD 19.111 § 43 1) Administrations shall follow Annex 1 of Recommendation ITU-R M.585-7 concerning the assignment and use of maritime mobile service identities. (WRC-15) ARTICLE 21 Terrestrial and space services sharing frequency bands above 1 GHz Section I − Choice of sites and frequencies MOD _______________ 1 21.2.1 For their own protection receiving stations in the fixed or mobile service operating in frequency bands shared with space radiocommunication services (space-to-Earth) should also avoid directing their antennas towards the geostationary-satellite orbit if their sensitivity is sufficiently high that interference from space station transmissions may be significant. In particular, in the frequency bands 13.4-13.65 GHz and 21.4-22 GHz, it is recommended to maintain a minimum separation angle of 1.5 with respect to the direction of the geostationary-satellite orbit. (WRC-15)