(1) As long as the parties have not yet agreed on all points of a contract on which an agreement was required to be reached according to the declaration even of only one party, the contract is, in case of doubt, not concluded. An agreement on individual points is not legally binding even if they have been recorded.
(2) If notarial recording of the contract contemplated has been arranged, then the contract is, in case of doubt, not concluded until the recording has taken place.