To simplify things a little, the rules index uses a variety of abbreviations.
Certain rules are specific to either baseball or softball. In addition, in some situations, the same rule is numbered slightly differently in the baseball rulebook versus the softball rulebook. Finally, there are rules that are specific to the All Star Tournament, as well as relevant comments in Make The Right Call, The Casebook of Little League.
To help sort through all of this, the following prefixes are used in the Rules Index where appropriate:
| Prefix | Meaning |
|---|---|
| BB | Baseball |
| SB | Softball |
| BL | Big League |
| MTRC | Make The Right Call |
| AST | All Star Tournament |
In addition, the following abbreviations are used:
| Abbrev | Meaning |
|---|---|
| AR | Approved Ruling |
| EX | Exception |
| M/M | Majors and Minors |
| J/S | Junior, Senior |
| I/J/S | Intermediate, Junior, Senior |