by-law, bye-law
A. local law or custom established by common consent XIII;

B. ordinance regulating internal matters made by a local authority or corporation XIV. In A orig. var. with birlaw (XIII) — ON. *býjarlagu, f. gen. sg. of bȳr habitation, village, town (f. *bū-; cf. BOWER1) + *lagu LAW; in B alt. of this by substitution of by sb. town and by assoc. with BY-.

by·law / ˈbīˌlô/ (also by-law) • n. 1. a rule made by a company or society to control the actions of its members.2. a regulation made by a local authority; an ordinance.

BYLAWS

The rules and regulations enacted by an association or a corporation to provide a framework for its operation and management.

Bylaws may specify the qualifications, rights, and liabilities of membership, and the powers, duties, and grounds for the dissolution of an organization.