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30 U.S. Code § 522 - Conflicting periods of location of claims

(a)
If any mining claim which shall have been located subsequent to December 31, 1952, and prior to December 11, 1953, and which shall be entitled to the benefits of this chapter, shall cover any lands embraced within any mining claim which shall have been located prior to January 1, 1953, and which shall be entitled to the benefits of this chapter, then as to such area of conflict said mining claim so located subsequent to December 31, 1952, shall be deemed to have been located December 11, 1953.
(b)
If any mining claim hereafter located shall cover any lands embraced within any mining claim which shall have been located prior to February 10, 1954, and which shall be entitled to the benefits of this chapter, then as to such area of conflict said mining claim hereafter located shall be deemed to have been located one hundred and twenty-one days after August 13, 1954.
(Aug. 13, 1954, ch. 730, § 2, 68 Stat. 709.)