internal rules; bylaws; private regulations
Refers to rules or regulations established within an organization, company, or group, as opposed to public laws. The gloss 'tradition' is a rare, extended use for unwritten internal norms.
Overtime pay is provided according to the company's internal rules.
This club has internal rules known only to its members.
How to take leave is stipulated in the company's internal rules.
Everyone needs to act in accordance with the internal rules.
That act was in violation of the company's internal rules.
The board decided to revise the internal regulations.
規約 usually refers to a formal set of bylaws agreed upon by members (e.g. a club's constitution), whereas 内規 is more often an organization's own internal administrative rules, not necessarily agreed to by all members.
規定 refers to specific provisions or stipulations within a rule or law, while 内規 refers to the whole body of an organization's private rules.
法律 is a public law enacted by the state and binding on everyone, whereas 内規 is a private rule that only applies within a specific organization.
Standard kanji spelling; no kana-only variant is specified.
Compound of 内 (internal) and 規 (rule, regulation). The term is straightforward and modern, with no obscure historical derivation.