BT.2 (p. 30): Local rules for citation and style.
Rule 10.3.1 (102): Rule for parallel citing and which source to cite.
Rule 10.3.3 (p. 104): Public domain format rules.
T1.3 (p. 248): Citation style for reporters.
Handy reference for deciding where and when a parallel citation should be used:
If you are NOT citing a state case, don't worry about a parallel citation
If you are citing a state case, but NOT to a state court in that same state, don't worry about a parallel citation.
If you are citing a state case that IS from a state court in the same state, you will need a parallel citation.
If you are citing a state case that IS from a state court in the same state, and uses the public domain format, you will need a parallel citation.
Parallel citations are used when the same case is printed in two or more different reporters. In other words, a parallel citation references location information for more that one source of a case. Rules 10.3.1 and 10.3.3 illustrate when and how to use a parallel citation.
The two major instances in which a parallel citation may be needed are:
1. If there is a state reporter that prints the case in addition to a regional reporter, cite both the state and regional reporters (Rule 10.3.1). Cite the state reporter first, then the regional reporter.
2. If the citation is in public domain format, give both the public domain citation and the regional reporter citation (Rule 10.3.3). Put the public domain citation first, then the regional reporter citation.
DO NOT include a parallel cite if:
1. The case will be filed with a federal court.
2. The case was filed with a court outside of the state. In this case, only cite to the regional reporter.