Acts 19:39 - Ellicott's Commentary On The Whole Bible

It shall be determined in a lawful assembly. — Better, in the lawful assembly. The argument is that, should the alleged grievance be one that called for legislative rather than judicial action, the matter would have to be referred to the regular meeting of the ecclesia, which the town-clerk had probably the right to summon. There they could present their gravamen, and petition for redress. Here also the inscriptions discovered by Mr. Wood (vi. 6, p. 50) give an interesting illustration of the official phraseology. An image of Athena is to be placed “above the bench where the boys sit,” at “every lawful (or regular) ecclesia.”