So I understood perpituitery to mean "forever". But a document I'm looking at states "road constructed by .... within a period of 21 years..." "...which for the purpose of this ... be the perpituitery period.
Its to do with the sell off of some land by a property owner to a development corporation, which can then still remain to be used as access to said property by the owner.
Does it mean the access only lasts for 21 years? If not, what?