The canon gives us information about the activity of presbyters who remained beyond the control of their bishops: performing services in private houses. We do not know what exact religious services are meant by "agenda", although we may presume that the goal of the canon is to forbid the Eucharist and baptism from being performed without the knowledge or permission of the bishop. Neither do we know what the "domicilia" refer to: the houses of rich people where presbyters acted as private chaplains or the households of their origin where they remained after ordination and acted as chaplains to their families.
The canon is not especially harsh, it condemns such actions as "proving unworthiness to be a presbyter", but it does not actually threaten the culprits with immediate demotion, it also tends to attenuate their guilt by explaining that it may be caused by ignorance, and only later talking about the possibility of deceitfulness. In any case, the canon shows the limits of bishops' control over the liturgical activities taking place in their dioceses.
Repeated in the Breviary of Ferrandus .