Section 125

When the Commissioner has incurred costs and expenses in or about the execution of any work, which are, under this Act, payable by or recoverable from the owner or owners, the Commissioner may either recover such costs and expenses in the manner hereinbefore provided or, if he thinks fit, may obtain an undertaking or undertakings from such owner or owners for the payment of such instalments as will be sufficient to defray the whole amount of such costs and expenses.

Upon default in payment of any instalment upon the date appointed for payment thereof by any such undertaking, the whole of the balance then outstanding of such amount shall immediately become due and payable and notwithstanding any change in the ownership or occupation of the premises since the date of the undertaking, may be recovered by the same means and in the like manner as provided in section 124.[128