Yes. This is old, but I assume still valid:
https://www.pinnacle21.com/news/opencdisc-validator-14-and-sdtm-313-validation
"* SDTM 3.1.3 replaces previously published SDTM 3.1.2 Amendment 1 rules. So if you are still on Amendment 1, please use SDTM 3.1.3 configuration to validate your data"
Brian