"Marginally compliant aircraft" shall mean civil subsonic jet aeroplanes, that meet the certification limits laid down in Volume 1, Part II, Chapter 3 of Annex 16 to the Convention on International Civil Aviation by a cumulative margin of not more than 5EPNdB (Effective Perceived Noise in decibels), whereby the cumulative margin is the figure expressed in EPNdB obtained by adding the individual margins (i.e. the differences between the certificated noise level and the maximum permitted noise level) at each of the three reference noise measurement points as defined in Volume 1, Part II, Chapter 3 of Annex 16 to the Convention on International Civil Aviation;
"Mejno ustrezni zrakoplovi " pomenijo civilna podzvočna reaktivna letala, ki so v skladu s certifikacijskimi omejitvami, določenimi v poglavju 3 dela II zvezka 1 Priloge 16 h Konvenciji o civilnem letalstvu, v razponu zbirne meje, ki ne presega 5 EPNdB (Effective Perceived Noise in decibels - dejansko zaznana raven hrupa v decibelih), pri čemer je zbirna meja število, izraženo v enotah EPNdB, ki ga dobimo s seštevanjem posameznih odstopanj (t.j. razlike med certificirano ravnjo hrupa in najvišjo dovoljeno ravnijo hrupa) na vsaki od treh referenčnih točk za merjenje hrupa, kakor je opredeljeno v poglavju 3 dela II zvezka 1 Priloge 16 h Konvenciji o civilnem letalstvu;