law: Chapter VIII
  Rent and Its Recovery
  Part I.-
  Basic rent of tenants
  63. Liability for payment of rent.-
  Every occupancy, exproprietory, hereditary or non-occupancy tenant shall be liable to pay rent in accordance with the provisions of section 64: Provided that if, at the commencement of this Act, a lower rent is payable by a tenant, or, after such commencement, a lower rent is agreed upon between him and his landholder, he shall be liable to pay such rent only.