Section 11-707. Records to be kept

Every landlord of taxable premises and
  every tenant of taxable premises shall keep records  of  rent  paid  and
  received  by  him or her in such form as the commissioner of finance may
  by regulation require, all leases or agreements which fix the  rents  or
  rights  of tenants of taxable premises, and such other records, receipts
  and other papers relevant to the ascertainment of the tax due under this
  chapter as the commissioner of finance may by regulation  require.  Such
  records shall be offered for inspection and examination at any time upon
  demand  by  the  commissioner  of  finance.  Such  records,  unless  the
  commissioner of finance consents to a  sooner  destruction  or  requires
  that  they be kept for a longer time, shall be preserved for a period of
  three years except that leases or agreements  which  fix  the  rents  or
  rights  of  a tenant shall be kept for a period of three years after the
  expiration of the tenancy thereunder.