Explain the kinds of deeds requiring registration.

Registration — the jalani of deeds at the Land Revenue Office (Units 3–4's machinery) — is the immovable-property system's keystone:1. Constitutive function: for immovables, registration is (in general) the transfer'scompletion — ownership passes with the register's entry, not the mere deed or payment;2. Evidentiary function: the registered deed and the lalpurja as the near-conclusive proof of title (the records' presumption — the certified srestha transcripts as the court's staple);3. Publicity function: the public register giving the world notice — protecting purchasers (the priority rules; the bona fide acquisition's base) and lenders (the mortgage's record);4. Anti-fraud function: the office's verification (identity, title, the court-lis check) filtering the forged-deed and double-sale pathologies;5. Fiscal function: the registration fees and the land-revenue system's currency;6. Planning function: the records feeding the state's land-use, ceiling and acquisition administration.