Moving the cross is necessary, the authority said, to permit construction on the east side of the trade center site.
That permitted the construction of another column-free space three levels below.
This would permit the construction of stores and apartments on the empty lots.
They had been blamed for permitting poor construction and not responding quickly enough to the needs of victims.
"People are not going to permit the construction of new facilities and pay for them until there's a major outage," he said.
This action permitted the construction of platforms, station buildings and a parking area to begin.
The staircase will have to be moved to permit excavation and construction on the Tower 2 site.
That made the land acquisition too expensive to permit the construction of rental apartments.
The agreement permitted construction to go ahead on the convention headquarters hotel, but otherwise terms were not disclosed.
An Act permitting the construction of the railway was passed in July 1858.
