This act shall apply only where the occupancy, or intention to occupy, or the ownership or belief of ownership of said individual or individuals or his or their predecessors in interest derives in whole or in part from defective tax sale or defective tax foreclosure proceedings, and where said individual or individuals acquire his or their interest or ownership or purported interest or ownership without actual knowledge of the outstanding claim of the owner or his predecessor as mentioned above, and where the owner of such outstanding claim acquires same with knowledge, constructive or actual, that said individual or individuals were attempting, or might attempt or might have attempted, to foreclose or purchase or otherwise acquire said outstanding interest or claim.

L.1964, c. 184, s. 2.