13 Tex. Admin. Code § 9.7
No postage is required to return materials. When returning books, magazines, or equipment, the borrower must deliver the materials or equipment to the United States Postal Service by placing the items in a mailbox or taking them to a post office. Placing them on a doorstep for the mail carrier to pick up does not constitute delivery to the postal service and, if problems arise by use of this method, the borrower is responsible for the lost or damaged books.
Source Note:The provisions of this §9.7 adopted to be effective March 13, 1991, 16 TexReg 1361.