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Revenue Procedure 83-23, 1983-1 C.B. 687: A reference list of exempt organizations that are not required to file an annual information return on Form 990, Return of Organization Exempt from Income Tax.
Revenue Procedure 83-32, 1983-1 C.B. 723: Updating Rev. Proc. 73-29, 1973-2 C.B. 483, which sets forth the return filing requirements for charitable and split-interest trusts.
Revenue Procedure 83-87, 1983-2 C.B. 6: A list of Indian tribal governments that are treated similarly to states for specified purposes under the Internal Revenue Code.