At the 106th Street, 116th Street and 125th Street stations, a transit easement shall be provided to accommodate, whether singly or in any combination, light wells, stairs, ramps, escalators, elevators, passageways, or ancillary facilities required to support the functioning of subway station or rail mass transit facilities, including, but not limited to, emergency egress or ventilation structures, the Metropolitan Transportation Authority shall, in consultation with the owner of the zoning lot and the City Planning Commission, determine the appropriate type of transit easement and reasonable dimensions for such transit easement volume.