 Moreover, so long as he has the warship of the land, the guardian shall keep in repair the houses, parks, preserves, ponds, mills, and other things pertaining to the land out of the revenues from it, and he shall restore to the air when he comes of age his land fully stocked with plows, and all other things in at least the measure he received. All these things shall be observed in the case of warships of vacant, archbishoprics, bishoprics, abbeys, priories, churches, and dignities that pertain to us, except that warships of this kind may not be sold.