Town of Derry
14 Manning Street, Derry, NH 03038
Conservation Restriction
RSA 79:B
"Conservation restriction" means a permanent restriction of open space land by deed granted in perpetuity  to a federal, state, county, local or other government body or to a charitable, educational, or other nonprofit corporation established for the purposes of natural resource conservation.  

The property must meet the tests of public benefit in RSA 79-B:4. There are no minimum acreage requirements. Conservation Restrictions must be recorded, on a form provided by the Department of Revenue Administration, at the Registry of Deeds before April 15th of the qualifying tax year.