(a) Islands. (1) Survey is not necessary. However, unsurveyed islands shall be determined by the Secretary to be public lands of the United States.

(2) Islands shall be surveyed at the request of the applicant, as provided in part 9185 of this chapter.

(b) Determination as to whether lands, other than islands, are public lands of the United States erroneously or fraudulently omitted from the original surveys shall be by survey. Surveys shall be in accordance with the requirements of part 9185 of this title.