25 CFR 248.7: Liability for condition and use of structures.

Any private structures including drying sheds, tents, tepees, or fishing platforms erected, placed, or maintained on the sites are the sole responsibility of their owners, and all use of such structures shall be at the user's or owner's sole responsibility and risk. Neither the United States nor any officer or employee thereof warrants, makes any representation, or is responsible for the safety or condition of any such structure.