| русский | rus-000 |
| диспозитивная норма | |
| العربية | arb-000 | شرط أو بند خياري |
| العربية | arb-000 | قاعدة مكملة |
| 普通话 | cmn-000 | 任择条款 |
| 普通话 | cmn-000 | 剩余规则 |
| 普通话 | cmn-000 | 备用规则 |
| English | eng-000 | discretionary rule |
| English | eng-000 | optional clause |
| English | eng-000 | optional rule |
| English | eng-000 | optional standard |
| English | eng-000 | permissive rule |
| English | eng-000 | residual rule |
| English | eng-000 | residuary rule |
| русский | rus-000 | остаточная норма |
| русский | rus-000 | факультативная клаузула |
| español | spa-000 | cláusula facultativa |
| español | spa-000 | norma supletoria |