Sometimes the following translation is proposed "A deacon may not seat in the presence of a presbyter" (Hefele 1895: 209; see also can. 20 of the Council of Laodicea). The canon most probably refers to the to the rules to be observed inside churches (see similar canons where it is explicitly stated, e.g. Collectio canonica Arelatensis can. 15 ; 4th Council of Toledo 633 can. 39 ; Dockter 2013: 156).