Historic Preservation APA-PAS #450. Preparing a Historic Preservation Plan, March 1994. Summary Historic preservation ordinances became popular in the 1970's and 1980's which introduced a new wave of planning from the local to the state level. A historic preservation plan can be adopted as its own separate document but this Report recommends it be adopted as part of the master plan (comprehensive plan). If you are interested in knowing what a preservation plan is or how to prepare one, this report is for you! You will also learn the elements of a good preservation plan. A copy of this report is available for review at the NH Office of State Planning, 2 1/2 Beacon Street, Concord, NH during regular business hours: Monday - Friday 8:00 am to 4:30 pm. You may obtain this report from: Planners' Book Service (312) 786-6344 122 S. Michigan Ave. (312) 431-9985 - fax Suite 1600 Chicago, IL 60603-6107 Bookorder@planning.org