(a) Nothing in this act requires that the power of eminent domain be exercised to acquire property. Whether property necessary for public use is to be acquired by purchase, other means or by eminent domain is a decision left to the discretion of the person authorized to acquire the property.
(b) Subject to any other statute relating to the acquisition of property, any person or public entity authorized to acquire property for a particular use by eminent domain may also acquire the property for the use by grant, purchase, lease, gift, devise, contract or other means.