A few people have raised the question lately: 'Can I control how my assets are used after I pass away?' Here is an article that addresses conditions in Wills, thought it might be of interest to some people.
http://www.townsendslaw.com.au/blb-news/469/conditional-gifts-in-wills-how-far-can-you-go
http://www.townsendslaw.com.au/blb-news/469/conditional-gifts-in-wills-how-far-can-you-go