; (B) if the head of the agency is required to publish a notice under subsection (a)(2), include in the notice a solicitation for nominations of potential committee members; and (C) provide in the notice under subparagraph (B) a mechanism for interested persons to comment through a publicly available website of the agency. (2) The head of an agency shall consider any comments submitted in accordance with paragraph (1)(C) in appointing the members of an advisory committee. (3) The head of an agency shall solicit nominations under paragraph (1) not less frequently than once every 2 years. (4) Notwithstanding paragraph (1), if a vacancy in an advisory committee occurs before the next scheduled solicitation for nominations under this subsection, an agency may appoint a member from among individuals that were previously nominated to be a member of the advisory committee. (d) Designation of committee members (1) An individual appointed to an advisory committee who is not a full-time or permanent part-time officer or employee of the Federal Government shall be designated as— (A) a special Government employee, if the individual is providing advice based on the individual’s expertise or experience; or (B) a representative, if the individual is representing the views of an entity or entities outside of the Federal Government. (2) An agency may not designate committee members as representatives to avoid subjecting them to Federal ethics rules and requirements. (3) The designated agency ethics official for each agency shall review the members of each advisory committee that reports to the agency to determine whether each member’s designation is appropriate, and to redesignate members if appropriate. The designated agency ethics official shall certify to the head of the agency that such review has been made— (A) following the initial appointment of members