2021 Revisions SSUSA Rules (https://seniorsoftball.com/?news&story=1765)
2019-2020 SSUSA Rules (https://seniorsoftball.com/wc/wc2019/SSUSA-Rulebook-2019-Web.pdf)
2022 Rules Summary (https://seniorsoftball.com/multimedia/ssusa_2022_rules_summary.pdf)