The Supreme Court held that the government cannot be estopped or deemed to have waived statutory powers in exercising sovereign, legislative, or executive functions. Lands in Dadra and Nagar Haveli granted under Portuguese “Alvara” system were validly rescinded for non-cultivation, following due process. Mere delay does not amount to waiver. High Court can interfere in second appeals only for perverse findings or misapplication of law. Public interest and statutory obligations override any claims of acquiescence, reinforcing that estoppel does not bind the government.