From what I understand, even today certain important bills in the UK parliament are entitled to be transcribed onto vellum/parchment(?) if requested by the hous

From what I understand, even today certain important bills in the UK parliament are entitled to be transcribed onto vellum/parchment(?) if requested by the house. Such that this is one of the few major users of skins still left in our modern age. edit: this may have been changed just as of a few years ago, on the argument that good quality archival paper practically lasts as long as parchment/vellum, and is much cheaper...