While RTC has a dominant role over the "mother church," CSI and its subordinate organizations, the relationship to the Church of Spiritual Technology (CST) is unclear. While the above-mentioned "assignment agreement" with L. Ron Hubbard on May 10, 1982 granted CST corporative authority over RTC with respect to Scientology's trademarks and service marks, there is no sign that CST ever executed any internal, "ecclesiastical" authority over RTC. In fact, the U.S. Claims Court noted in its opinion in a tax case, which involved CST in 1992: