Before any construction, alteration, or improvement of any nature is undertaken on a privately owned, officially designated state monument or historic site by any person, the person shall give the department three months notice of intention to construct on, alter, or improve it. Before the expiration of the three-month notification period, the department shall either begin eminent domain proceedings under AS 41.35.060(b) or undertake or permit the recording and salvaging of any historic, prehistoric, or archeological information considered necessary.