Sir
none of the principles of estoppel, waiver, limitation will come to the new company's rescue
you must be aware that a company is a separate legal juristic entity
the old and the new companies have different and independent identities and personalities
even though the name may be the same, but the ROC filings clearly would indicate 2 separate companies having their respective independent legal identities
so transfer of the assets, including tenancy rights, of the old company to the new company, will clearly fall under the realm of 'subletting' which is prohibited by the rent law, unless there was a contract to the contrary, entitling the tenant to sublet the tenanted premises without consent of landlord
even though the landlady may have written the letter demanding increase of rent and accepted revised rent for 2 years - that in no way amounts to estoppel or waiver or acquiescence - because in the first place she was not aware, rather not informed about the change in constitution, which tantamount to subletting
you must also appreciate the doctrine of 'lifting of the corporate veil' applicable in case of companies
Law is fair and equitable. It is based on common sense and logic
if every tenant company would be permitted to transfer its assets to a new company having the same incidents as that of the old company, then this would clearly be prejudicial to the landlord, who would be deprived of the tenancy premium, every time the tenant company changes its constitution/character and emerges as a new company
This is my honest opinion on your query
however i will do research to find some citation which touches the subject matter