If all of the documents constituting the project instrument are recorded, time-shares shall not be created in any unit in a project unless expressly permitted by the project instrument. No amendment to a project instrument which is recorded shall permit the creation of time-shares unless the owners of at least eighty per cent of the units, or any larger vote required by the project instrument or by law, consent to such amendment.
Mass. Gen. Laws ch. 183B, § 11