[Code of Federal Regulations] [Title 14, Volume 5] [Revised as of January 1, 2007] From the U.S. Government Printing Office via GPO Access [CITE: 14CFR1215.108] [Page 145] TITLE 14--AERONAUTICS AND SPACE CHAPTER V--NATIONAL AERONAUTICS AND SPACE ADMINISTRATION PART 1215_TRACKING AND DATA RELAY SATELLITE SYSTEM (TDRSS)--Table of Contents Subpart 1215.1_Use and Reimbursement Policy for Non-U.S. Government Users Sec. 1215.108 Defining user service requirements. Potential users should become familiar with TDRSS capabilities and constraints, which are detailed in the TDRSS User's Guide (GSFC document, STDN No. 101.2), as early as possible. This action allows the user to evaluate the trade-offs available among various TDRSS services, spacecraft design, operations planning, and other significant mission parameters. When these user evaluations have been completed, and the user desires to use TDRSS, the user should initiate a request for TDRSS service. (a) Initial requests for TDRSS service from non-U.S. Government users should be addressed to NASA Headquarters, Code OX, Space Network Division, Washington, DC 20546. Upon review and preliminary acceptance of the service requirements by NASA Headquarters, the appropriate areas of GSFC will be assigned to the project to produce the detailed requirements, plans and documentation necessary for support of the mission. Changes to user requirements shall be made as far in advance as possible and shall be submitted in writing to both NASA Headquarters, Code OX, Space Network Division, and GSFC, Code 501, Greenbelt, MD 20771. (b) Acceptance of user requests for TDRSS service is the sole prerogative of NASA. Although TDRSS represents a significant increase to current support capabilities, service capacity is finite, and service will be provided in accordance with operational priorities established by NASA. Request for services within priority groups shall be negotiated with non-NASA users on a first come, first service basis for inclusion into the TDRSS mission model. [48 FR 9845, Mar. 9, 1983, as amended at 56 FR 28049, June 19, 1991]