; (ii) in paragraph (10), by striking the period at the end and inserting ; and ; and (iii) by adding at the end the following: (11) incorporate the metrics established under section 3(b)(3) of the Clear and Concise Content Act of 2023 . . 4. Agency responsibilities (a) In general The head of each agency shall ensure compliance with this Act, including through the designation of a senior officer at the agency (not lower than an Assistant Secretary or equivalent) to oversee implementation by the agency, including all bureaus, offices, or other subordinate components of the agency. (b) Requirement To use plain language in covered content Except as provided in the amendments made by section 5(1), on and after the date that is 1 year after the date of enactment of this Act, each agency shall use plain writing in all covered content made available by the agency, consistent with the guidance issued by the Director under section 3(a). (c) Requirement for feedback from customers The head of each agency shall ensure that there are opportunities and mechanisms in place (whether in paper or electronic form) that incorporate plain writing instructions for feedback from individuals or entities obtaining services from or engaging in transactions with the agency. (d) Public feedback The head of each agency shall maintain an accessible form, survey tool, or other portion of a website of the agency to solicit feedback from the public on compliance with this Act by the agency and to collect the feedback and data required under section 3(b)(5). 5. Amendments to the 21st Century IDEA Act Section 3 of the 21st Century Integrated Digital Experience Act ( 44 U.S.C. 3501 note) is amended— (1) in subsection (a)— (A) in the matter preceding paragraph (1), by striking Not later and inserting Except as provided in paragraph (9), not later ; (B) in paragraph (7), by striking and at the end; (C) in paragraph (8), by striking the period at the end and inserting ; and