; (2) in the third sentence— (A) by striking physician certification and inserting certification ; (B) by inserting (or in the case of regulations to implement the amendments made by section 4407 of the CARES Act , the Secretary shall prescribe regulations, which shall become effective no later than 6 months after the enactment of such Act)) after 1981 ; and (C) by striking a physician who and inserting a physician, nurse practitioner, clinical nurse specialist, certified nurse-midwife, or physician assistant who ; and (3) in the fourth sentence, by inserting , nurse practitioner, clinical nurse specialist, certified nurse-midwife, or physician assistant after physician ; and (4) in the fifth sentence— (A) by inserting or no later than six months after the enactment of this legislation for purposes of documentation for certification and recertification made under paragraph (2) by a nurse practitioner, clinical nurse specialist, certified nurse-midwife, or physician assistant, ; and (B) by inserting , nurse practitioner, clinical nurse specialist, certified nurse-midwife, or physician assistant after of the physician . (b) Part B provisions Section 1835(a) of the Social Security Act ( 42 U.S.C. 1395n(a) ) is amended— (1) in paragraph (2)— (A) in the matter preceding subparagraph (A), by inserting , a nurse practitioner or clinical nurse specialist (as those terms are defined in section 1861(aa)(5)) who is working in accordance with State law, or a physician assistant (as defined in section 1861(aa)(5)) under the supervision of a physician, who is after in the case of services described in subparagraph (C), a physician ; and (B) in subparagraph (A)— (i) in each of clauses (ii) and (iii) of subparagraph (A) by inserting , a nurse practitioner, a clinical nurse specialist, or a physician assistant (as the case may be) after physician