ICD-GPS-870 - GPS.gov

60 APPENDIX 6: LETTERS OF EXCEPTION
60.1 Scope
As indicated in paragraph 1.3, initial signature approval of this document, as well as
approval of subsequent changes to the document, can be contingent upon a "letter of
exception". This appendix depicts such "letters of exception" when utilized by any
signatory of this document in the initial approval cycle and/or in the change approval
process. The ICC will omit such letters of exception from subsequent revisions of this
document based on written authorization by the respective signatory (without
processing a proposed interface revision notice (PIRN) for approval). When some (but
not all) of the exceptions taken by a signatory are resolved, the signatory shall provide
the ICC with an updated letter of exception for inclusion in the next ICD revision (without
processing a PIRN for approval.
60.2 Applicable Documents
The documents listed in Section 2.1 shall be applicable to this appendix.
60.3 Letters of Exception
If signature approval of this document -- as affixed to the cover page -- is marked by an
asterisk, it indicates that the approval is contingent upon the exceptions taken by that
signatory in a letter of exception. Any letter of exception, which is in force for the
revision of the ICD is depicted in Figure 60-1. Signatories for whom no letter of
exception is shown have approved this version of the document without exception.
Figure 60-1 Letter of Exception
60-1
ICD-GPS-870
15 June 2011