Enote, ki pri koordinaciji letov uporabljajo OLDI, izvajajo predhodna sporočila o času preleta meje, sporočila o aktivaciji in sporočila o logični potrditvi tako,kakor je opisano v tem oddelku, razen kadar je dvostransko dogovorjeno, da se uporablja postopek dialoga koordinacije, kakor je opisano v oddelku 8 tega dokumenta, v tem primeru pa so pogoji za uporabo sporočil o aktivaciji in logični potrditvi opisani v tem oddelku.
Units using OLDI for the co-ordination of flights shall implement the ABI, ACT, and LAM as described in this section, except where it has been bilaterally agreed to use the co-ordination dialogue procedure as described in Section 8 of this document, in which case the conditions for the use of ACT and LAM messages are as defined in that section.