Definition of Sole Source
Texas Education Code Subchapter B., Section 44.031
X. Without complying with Subsection (a), the board of trustees of a school district may purchase an item that is available from only one source including:
A. an item for which competition is precluded because of the existence of a patent, copyright, secret process, or monopoly;
B. a film, manuscript, or book;
C. a utility service including electricity, gas, water; and
D. a captive replacement part or component for equipment.
XI. The exceptions provided by Subsection (j) do not apply to mainframe data-processing equipment and peripheral attachments with a single-item purchase in excess of $15,000.00.