This chapter shall not apply to the Panama Canal. The authority granted to the Secretary under sections
1223,
1224, and
1225 of this title shall not be delegated with respect to the Saint Lawrence Seaway to any agency other than the Saint Lawrence Seaway Development Corporation. Any other authority granted the Secretary under this chapter shall be delegated to the Saint Lawrence Seaway Development Corporation to the extent he determines such delegation is necessary for the proper operation of the Saint Lawrence Seaway.