Section 309. Right of occupier to execute works in default of owner

309. Whenever default is made by the owner of a building or land in the execution of a work required by or under this Act to be executed by him, the occupier of such building or land may, with the approval of the Municipality, cause such work to be executed, and the expense thereof shall, in the absence of any contract to the contrary 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.