The provisions of ORS § 192.005, 192.338, 192.345, 192.355, 273.990, 358.905 to 358.961 and 390.235 do not apply to a person who unintentionally discovers an archaeological object that has been exposed by the forces of nature on private property and retains the object for personal use, except for sacred objects, human remains, funerary objects or objects of cultural patrimony. [1983 c.620 § 15; 1993 c.459 § 3; 2017 c.242 § 1]