Applicable (adjective)

1. Able to be applied; relevant or appropriate in a particular situation.
2. Capable of being put into practice.

Origin:

Late 16th century: from latin applicabilis, from applicare "apply".

Examples:

1. The law is applicable to everyone.
2. The rule is only applicable in this specific case.
3. The discount is not applicable to sale items.
4. The theory is not applicable to this experiment.
5. The principle is applicable to all situations.