Re: terminating a contract
You can break a residential lease, regardless of it's contents. The process is roughly as follows:
1. Find a replacement tenant to take over the remainder of the lease.
2. Notify the landlord that you wish to transfer the lease and provide details of nominated replacement.
3. Whether or not the landlord accepts the new tenant you are free to leave without penalty (i.e. you are not liable for the rest of the lease and your deposit must be returned).
Contact Threshold for the exact procedure, notification periods etc.