(a) Except as necessary to administer this subchapter or on written authorization of the employee, the following information is confidential:
(1) whether a district employee has authorized a deduction under this subchapter;
(2) the amount of the deduction; and
(3) the name of a federation or fund or charitable organization that a district employee has designated to receive contributions.
(b) The designation of a charitable organization by a district employee is not confidential if the employee executes a written pledge card or other document indicating that the employee wishes to receive an acknowledgement from the charitable organization.
(c) The district shall provide notice to district employees of the confidentiality provisions described by this section.