23. (1) The persons to whom possession of a tank or possession of any land adjoining a tank has been restored under section 21 and their successors-in-interest shall, subject to any subsisting contact be responsible for maintaining the tank or such land in proper condition; and if, in the opinion of the Collector, the tank falls into disrepair or the land is not kept in proper condition, the Collector may, of his own motion, or on the application of any person interested in the tank, serve a notice in the prescribed form and manner on such persons or their successors-in-interest, requiring them to carry out such repairs to the tank or such improvements in the land as the Collector considers to be necessary. (2) If the repairs or the improvements referred to in sub-section (1) are not carried out to the satisfaction of the Collector, within six months from the date of service of the notice mentioned in sub-section (1), the Collector may himself carry out the repairs or such improvements or may authorise any person to carry them out.