Use Collected Rules and Regulations. Spell out on first reference. Subsequent references may use CRR.
The University of Missouri’s Collected Rules and Regulations constitute the official, comprehensive framework of policies governing the institution’s operations, standards of conduct and administrative procedures.
Example of citation: Collected Rules and Regulations, Chapter 170: Communications. Subsequent references may use CRR 170 or Chapter 170: Communications.
Example of section within a citation: Collected Rules and Regulations, Section 170.060: University Identification and Symbols. Subsequent references may use CRR 170.060. Alternative: Section 170.060: University Identification and Symbols.