Provide that nothing herein contained shall be taken to affect any special contract made between any such occupier and the owner respecting the payment of any such expenses as aforesaid.

Occupier, in default of owner, may execute work and deduct expenses from his rent Occupier, in default of owner, may execute work and deduct expenses from his rent.-- Where default is made by the owner of any building or land in the execution of any work required to be executed by him, the occupier of such building or land may, with the approval of the Council, cause such work to be executed and expense thereof shall be paid to him by the owner, or the amount may be deducted out of the rent from time to time becoming due from him to such owner.