Special Provisions
From the 26th Amendment's commencement (1971): (a) formerly-recognised princely-state Rulers (and their recognised successors) stopped being recognised as such; (b) "privy purses" (the annual payments guaranteed to former Rulers at the time of their states' accession to India) were abolished entirely, extinguishing all related rights/liabilities/obligations.
This ended the special "privy purse" payments and formal royal recognition that had been promised to former princely-state Rulers when their states acceded to India after independence - a historically significant and politically contentious 1971 reform that fully abolished these lingering royal-era financial privileges, over a decade after they were first agreed to.
This is why former princely-state royal families, despite the earlier accession-era promises of continued privy purse payments and formal recognition, stopped receiving these government payments from 1971 onward - a decisive break from India's monarchical past.