An appointing authority may use any appropriate selection process to rate qualified applicants. A unit must be able to establish the job relatedness, reliability, and validity of the selection tests that it uses. A selection test must be: free of charge; and except as provided in paragraph (2) of this subsection, open to all qualified applicants. An appointing authority: may disqualify and refuse to examine an otherwise qualified applicant who intentionally falsifies information in the application; and shall give the applicant a written notice of the reason for the proposed disqualification. An applicant who is disqualified under this subsection may submit a written response to the notice.