; (2) limiting the noncomplying party’s claims, defenses, or right to introduce evidence; and (3) rendering a default decision against the noncomplying party. (f) Regulations The Secretary shall promulgate a proposed rule not later than 180 days after the date of enactment of this Act and a final rule not later than 18 months after such date of enactment, that— (1) provides procedures for the disqualifications and sanctions under this section and is appropriate for all parties; and (2) distinguishes between parties that are represented by an attorney and parties that are not represented by an attorney. . 105. Readjudicating cases involving certain chest radiographs Part C of the Black Lung Benefits Act ( 30 U.S.C. 931 et seq. ), as amended by section 103, is further amended by adding at the end the following: 436. Readjudicating cases involving discredited expert opinions (a) Definitions In this section: (1) Covered chest radiograph The term covered chest radiograph means a chest radiograph that was interpreted as negative for simple pneumoconiosis, complicated pneumoconiosis, or progressive massive fibrosis by a physician with respect to whom the Secretary has directed, in writing and after an evaluation by the Secretary, that such physician’s negative interpretations of chest radiographs not be credited, except where subsequently determined to be credible by the Secretary in evaluating a claim for benefits under this title. (2) Covered individual The term covered individual means an individual whose record for a claim for benefits under this title includes a covered chest radiograph. (3) Covered survivor The term covered survivor means an individual who— (A) is a survivor of a covered individual whose claim under this Act was still pending at the time of the covered individual’s death