; (2) by redesignating paragraphs (1) and (2) as subparagraphs (A) and (B), respectively, and moving the indentation of each such subparagraph 2 ems to the right; (3) by striking the period at the end of the subparagraph (B), as so redesignated, and inserting ; or ; and (4) by adding at the end the following new paragraph: (2) section 1837(i)(5), the coverage period shall begin on the first day of the month following the month in which the individual so enrolls. . (c) No increase in premium Section 1839(b) of such Act ( 42 U.S.C. 1395r(b) ) is amended— (1) in the first sentence, by inserting , (i)(5), after subsection (i)(4) ; and (2) in the second sentence, by inserting before the period at the end the following: or months for which the individual can demonstrate that the individual was enrolled in COBRA continuation coverage (as such term is defined in section 1837(i)(5)(D)). . (d) Updating COBRA continuation coverage notifications The Secretary of Labor, in consultation with the Secretary of Health and Human Services, shall update the COBRA continuation coverage election notice and COBRA continuation coverage general notice required under section 606 of the Employee Retirement Income Security Act of 1974 ( 29 U.S.C. 1166 ) to be given by an employer to an employee eligible for COBRA continuation coverage to include an explanation of how the Medicare secondary payer rules under section 1862(b) of the Social Security Act ( 42 U.S.C. 1395y(b) ) apply with respect to COBRA continuation coverage. (e) Effective date The amendments made by this section shall take effect on the date of the enactment of this Act and shall apply to periods of COBRA continuation coverage beginning on or after such date.