((a)) In the case of any water resources project which is authorized to be constructed by the Secretary before, on, or after , construction of which has not commenced before , and which involves the acquisition of lands or interests in lands for recreation purposes, such lands or interests shall be acquired along with the acquisition of lands and interests in lands for other project purposes.
((b)) The Secretary is authorized to acquire real property by condemnation, purchase, donation, exchange, or otherwise, as a part of any water resources development project for use for public park and recreation purposes, including but not limited to, real property not contiguous to the principal part of the project.