While coursework taken prior to admission to the Ph.D. program may, in certain instances, be used toward the degree, there are specific regulations governing how the coursework can be used and what part of the program must be taken at TTU after being admitted into the Ph.D. program. There may be cases in which a student's doctoral committee feels that a waiver of part of a requirement (e.g., part of the 15 semester hours in research) for the Ph.D. is warranted, given that a similar course has been taken. The committee may recommend a waiver, thus possibly reducing the number of hours required in this area if the waiver is approved. The leader of the concentration determines course substitutions in their specific area. Remember, all requirements for the degree, including the dissertation and transfer credit, must be completed within a period of no more than eight (8) consecutive years (Please refer to "Academic Requirements" on page 14, item 3).