16 Tex. Admin. Code § 79.32
In addition to the record keeping requirements of §79.31, any person conducting a weather modification operation with an operational or target area that includes any part of a Texas county and that employs aircraft for reconnaissance or seeding purposes must record and maintain, for each operation, the following:
(5) description of each flight track logged in such a manner as to allow a complete and accurate reconstruction of the run and identified at the beginning and ending of each flight by one of the following methods:
Source Note:The provisions of this §79.32 adopted to be effective December 30, 2001, 26 TexReg 10525; amended to be effective August 14, 2002, 27 TexReg 7104; amended to be effective July 13, 2004, 29 TexReg 6641.