(3) In determining whether such transaction was bona fide, the commissioner may consider whether at such multiple dwelling or any other such multiple dwelling such owner did (i) otherwise engage or participate in harassment; or (ii) with intent that harassment be performed, agree with one or more persons to engage in or cause the performance of harassment; or (iii) with intent that another person engage in conduct constituting harassment, solicit, request, command, importune or otherwise attempt to cause such person to engage in conduct constituting harassment. The commissioner may also consider the relationship between the parties to the transaction.
(4) A waiver of a certification pursuant to this subdivision shall state the findings of the commissioner.
f. (1) The commissioner may rescind a certification of no harassment or a waiver thereof granted with respect to the alteration or demolition of a multiple dwelling if the commissioner finds that harassment has occurred at the multiple dwelling with respect to which such certification or waiver thereof was issued after the period of time covered by such certification but prior to the commencement of substantial work pursuant to an alteration permit or demolition permit issued on the basis of such certification or waiver thereof.