regardless of; whether or not ~
Expresses 'regardless of' with a formal, written tone, often used in official contexts.
This pattern is a formal, written expression meaning 'regardless of' or 'whether or not'. It emphasizes that the outcome is unaffected by the condition mentioned. It is often used in official documents, announcements, or speeches. The three forms are interchangeable, with いかんにかかわらず being the most common in modern usage. いかんによらず sounds slightly more literary, and いかんをとわず is a bit older or more legalistic. In speech, you'd rarely use these; instead, you'd say にかかわらず or ても.