The name of an applicant for the position of executive director, chief investment officer, or chief audit executive of the Teacher Retirement System of Texas is excepted from the requirements of § 552.021, except that the board of trustees of the Teacher Retirement System of Texas must give public notice of the names of three finalists being considered for one of those positions at least 21 days before the date of the meeting at which the final action or vote is to be taken on choosing a finalist for employment.