By the late-1970s, over 4,000 such sites had been designated.
"The site, where the parking lot is, was already designated for the museum."
One year later, in 1975, the site was designated as the nation's first marine sanctuary.
Otherwise, he said, it will remain in effect until the city has designated sites for 200 homes.
The site of the wreck is now designated as a war grave.
Six sites have already been designated and final agreement on the seventh is expected this week.
In 2002 the site was officially designated a war grave by the British government.
These sites were designated as being of national historic significance.
The site of the former White House itself is now designated for development.
Months later, ground had not been broken at the site designated for the Taylors' home.