Title of purchaser not to be impeached on the ground of irregularity etc.

When a sale has been made in the professed exercise of a power of sale under section 12 and has been confirmed under sub-section (3) of section 14, the title of the purchaser shall not be impeachable on the ground that no case had arisen to authorise the sale or that due notice was not given or that the power was otherwise improperly or irregularly exercised, but any person damnified by an unauthorised or improper or irregular exercise of the power shall have his remedy in damages against the Central Mortgage Bank or the concerned primary mortgage bank, as the case may be.