1) Indeed , The answer of Misses Klein is correct and complete. Very litte to add.
Besides the ILO conventions, principles it might be usefull to investigate if other social auditschemes are applied in the site/sector/country such as GLOBAL GAP GRASP, ISO8000 etc that have a similar approach. For exemple GLOBAL GAP GRASP has the concept of NIG , National Interpretation Guidelines, that went through a stakeholder process an provides practical guidance.
2) Goal 3, it has 3 directly correlated Pinciples 5, 6 and 9.
Goal 12, Pro Terra as a rare scheme that combines People Planet and Profit , most of the schemes are focused on one or max 2 topics GLOBAL GAP + GRASP.