The specific rule is; that the legal owner, once entered into an option to sell his land, is then restricted from exercising within the time period agreed, he / she. He/she is obliged to notify the person who is part of the agreement of his intentions of sellingto sell the land beforehand. In doing so, it is highly likely that once the agreement is registered, from the date of commencement and "the documents must be signed by or on behalf of each party, " the land owner will then immediately become bound to the agreement.
On the other hand, if the equitable interest of the option to purchase the land is found to be unregistered, then you will find that the legal owner will be free from the agreement and could exercise the use or sale of the property in the way that he/she chooses.
Subsequently, if the person who has been granted the option to purchase the property then decides that he/she no longer wishes to exercise this option, then they can revoke the agreement immediately by presenting a notice to the land owner.