In this subtitle the following words have the meanings indicated. “Committee” means the Instructional Materials Access Guidelines Committee. “Instructional material” means textbooks and other materials written and published primarily for use by students in postsecondary instruction that are required or essential to a student’s success in a course of study in which a student with a disability is enrolled. “Instructional material” does not include materials for which software is not commercially available at a reasonable price to permit the conversion of existing electronic files of the materials into a format that is compatible with braille translation software or alternative media for students with disabilities, including mathematics and science materials. “Library” means the Maryland Library for the Blind and Print Disabled. “Printed instructional material” means instructional material in book or other printed form. “Structural integrity” means material composed of all of the textual printed instructional material. “Structural integrity” includes the text of the material, sidebars, the table of contents, chapter headings and subheadings, footnotes, indexes, glossaries, and bibliographies. “Structural integrity” does not include material composed of nontextual elements such as pictures, illustrations, graphs, or charts.