Section 91, Cap 196

Every mining lease, mining right and exclusive prospecting licence, and every instrument by or under which the rights,or any portion thereof granted by such lease, right or licence shall be transferred, assigned or surrendered, shall be registered both in the office of the Registrar General and in the office of the Chief Inspector of Mines within six months of the date thereof, or within such further time, if any, as the Registrar General or the Chief Inspector of Mines, as the case may be, shall allow, and if not so registered shall be null and void.