; (2) by striking the period at the end of paragraph (8) and inserting ; and ; and (3) by adding at the end the following: (9) the term core driller means any individual employed to engage in the act or process of obtaining cylindrical rock samples of uranium or vanadium by means of a borehole drilling machine for the purpose of mining uranium or vanadium. . 6. Expansion of use of affidavits in determination of claims; regulations (a) Affidavits Section 6(b) is amended by adding at the end the following: (3) Affidavits (A) Employment History For purposes of this Act, the Attorney General shall accept a written affidavit or declaration as evidence to substantiate the employment history of an individual as a miner, miller, core driller, or ore transporter if the affidavit— (i) is provided in addition to other material that may be used to substantiate the employment history of the individual; (ii) attests to the employment history of the individual; (iii) is made subject to penalty for perjury; and (iv) is made by a person other than the individual filing the claim. (B) Physical Presence in Affected Area For purposes of this Act, the Attorney General shall accept a written affidavit or declaration as evidence to substantiate an individual’s physical presence in an affected area during a period described in section 4(a)(1)(A)(i) or section 4(a)(2) if the affidavit— (i) is provided in addition to other material that may be used to substantiate the individual’s presence in an affected area during that time period; (ii) attests to the individual’s presence in an affected area during that period; (iii) is made subject to penalty for perjury