; or (2) the duty of a landowner to adhere to any State nuisance laws (including regulations) relating to waters in the State. 5. Consent for entry by Federal representatives Section 308 of the Federal Water Pollution Control Act ( 33 U.S.C. 1318 ) is amended by striking subsection (a) and inserting the following: (a) In general (1) Entry by Federal agency A representative of a Federal agency shall only enter private property to collect information about navigable waters if the owner of that property— (A) has consented to the entry in writing; (B) is notified regarding the date of the entry; and (C) is given access to any data collected from the entry. (2) Access If a landowner consents to entry under paragraph (1), the landowner shall have the right to be present at the time any data collection on the property of the landowner is carried out. . 6. Compensation for regulatory taking (a) In general If a Federal regulation relating to the definition of navigable waters or waters of the United States diminishes the fair market value or economic viability of a property, as determined by an independent appraiser, the Federal agency issuing the regulation shall pay the affected property owner an amount equal to twice the value of the loss. (b) Administration Any payment provided under subsection (a) shall be made from the amounts made available to the relevant agency head for general operations of the Federal agency. (c) Applicability A Federal regulation described in subsection (a) shall have no force or effect until the date on which each landowner with a claim under this section relating to that regulation has been compensated in accordance with this section.