A bill to prevent the estate tax law from operating to encourage or to require the destruction of open lands by amending the Internal Revenue Code of 1954 to provide that real property which is farmland, woodland, or open land and forms part of an estate may be valued, for estate tax purposes as it value as farmland, woodland, or open land (rather than at its fair market value), and to provide for the revocation of such lower evaluation and recapture of unpaid taxes in appropriate circumstances.