; (3) in subsection (b), by striking (b) Nothing and inserting the following: (c) Compliance with other provisions of law setting applicable water quality requirements Nothing ; (4) by striking the heading and section designation and all that follows through may be. at the end of subsection (a)(1) and inserting the following: 401. Certification (a) Definition of water quality requirements In this section, the term water quality requirements means— (1) the applicable provisions of sections 301, 302, 303, 306, and 307; and (2) any applicable State or Tribal regulatory requirements for point source discharges into waters of the United States. (b) State certifications (1) Certification required (A) Definitions In this paragraph: (i) Certification application The term certification application means a request from an applicant for a certification described in subparagraph (B). (ii) Certifying authority The term certifying authority , with respect to a certification application, means, as applicable— (I) the State or interstate agency to which the certification application was submitted