http://www.legislation.gov.uk/apni/1971/7/introductionLeasehold (Enlargement and Extension) Act (Northern Ireland) 1971An Act to enable lessees of certain premises held on long leases to purchase the fee simple interest in the land, to enable grantees of certain fee farm grants to redeem their fee farm rents, to enable such lessees to obtain an extension of their leases, and for matters connected with those matters.texttext/xmlenStatute Law Database2012-08-292009-10-01 1971 Chapter 7An Act to enable lessees of certain premises held on long leases to purchase the fee simple interest in the land, to enable grantees of certain fee farm grants to redeem their fee farm rents, to enable such lessees to obtain an extension of their leases, and for matters connected with those matters.[18th March 1971]