<Ul> <Li> Restraint on alienation </Li> <Li> Rule against perpetuities </Li> <Li> Rule in Shelley's Case </Li> <Li> Doctrine of worthier title </Li> </Ul> <Li> Restraint on alienation </Li> <Li> Rule against perpetuities </Li> <Li> Rule in Shelley's Case </Li>

How are changes normally made to an executed agreement of sale