The Department of Environmental Resources shall assist local organizations representative of landowners, conservation groups and local governments within the designated component acting as the local coordination mechanism for the implementation of this act. Nothing in this act shall be construed as granting authority to any level of government or private entity to establish streamside trails without the prior consent and agreement of riparian landowners. Nothing in this act shall be construed as granting additional authority to any municipality or county to restrict or prohibit the use of land within the designated scenic river corridor.