 So a vicar shall pay no tithes to the rector, nor the rector to the vicar, for "ecclesia decimas non-folvit ecclesiae".But these "personal" to both the king and the clergy ; for their tenant or lessee shall pay tithes of the same land, though in their own occupation it is not tithable.And, generally speaking, it is an established rule, that in "lay" hands, "modus de non-decimando non-valet".