Rongen, G. van (2005) Art. 29

Article 29 — Proceedings

The proceedings of all assemblies shall begin and end with prayer.

A clause like this has had its place in the Reformed Church Orders since Emden 1571, on the ground of Acts 1: 14 and 24.
There is no rule regarding the reading from the Scriptures at the beginning of an ecclesiastical assembly. This is, however, a sound tradition.