How to Use "voluntary" with Example Sentences

1. Should the iaea 's safety rules stay voluntary ?
2. It is a voluntary body , which proprietors have left when it offends them .
3. Blood donors are stalwarts of the voluntary sector , and rich countries with advanced medical systems rely on them .
4. The santiago principles are voluntary , with no penalties for non-compliance .
5. All operate voluntary schemes for promoting women into upper management .