Corporate Bylaws Adoption and Amendment Requirements in South Dakota

At a glance

Requirements one by one

S.D. Codified Laws § 47-1A-101 names the South Dakota Business Corporation Act that governs the ordinary domestic corporation addressed here.

Initial bylaws are mandatory after incorporation

S.D. Codified Laws §§ 47-1A-205 to 47-1A-206 require the incorporators or board to adopt initial bylaws and permit any management or affairs provision consistent with law and the articles. Named initial directors organize at a meeting called by a majority. If the articles name no initial directors, a majority of the incorporators calls a meeting to elect directors and complete organization or to elect a board that completes organization. The meeting may occur inside or outside South Dakota, and the sections state no post-filing deadline.

Every incorporator may instead sign written consent describing the action. For board action, S.D. Codified Laws § 47-1A-821 requires every director to sign and deliver a consent unless the articles or bylaws require a meeting. The board acts when all unrevoked consents arrive, although the consent may state an effective time and a director may revoke before completion.

Board and shareholders share later power

Under S.D. Codified Laws §§ 47-1A-1020 to 47-1A-1021, shareholders may amend or repeal bylaws. The board may also act unless the articles or the higher-board- vote section reserves power to shareholders, or shareholders expressly protect a bylaw from board amendment, repeal, or reinstatement.

S.D. Codified Laws § 47-1A-825.1(4) separately bars a committee from adopting, amending, or repealing bylaws.

A higher-board-vote bylaw follows special safeguards

S.D. Codified Laws § 47-1A-1021 follows the actor of origin for a bylaw that raises the board's quorum or vote. A shareholder-originated version remains shareholder-controlled unless it says otherwise; a board-originated version may be changed by the board or shareholders.

A shareholder-adopted or amended version may specify the shareholder or board vote needed for amendment or repeal. When the board changes such a bylaw, its action must satisfy the current or proposed quorum and vote, whichever is greater.

S.D. Codified Laws § 47-1A-207 separately permits temporary emergency bylaws unless the articles provide otherwise. Shareholders may amend or repeal them, and the emergency terms end when the catastrophic-event emergency ends.

Current bylaws are directly inspectable on written notice

S.D. Codified Laws § 47-1A-1601.1 requires the corporation to keep its current bylaws or restated bylaws and all current amendments at its principal office. Under S.D. Codified Laws § 47-1A-1602, a shareholder may inspect and copy them there during regular business hours after at least five business days' written notice. The text does not require the notice to be signed or impose the proper- purpose conditions that apply to separate categories of records.

The surveyed Act states no general signature, certification, acknowledgment, notarization, or Secretary of State filing requirement for ordinary bylaws.

A shareholder agreement has a ten-year default and market cutoff

S.D. Codified Laws § 47-1A-732 permits a qualifying shareholder agreement to restrict or eliminate board authority, allocate voting power, or otherwise govern the corporation even when inconsistent with another Act provision and not contrary to public policy. S.D. Codified Laws § 47-1A-732.1 lets it appear in the articles or bylaws with every current shareholder's approval, or in a writing signed by every current shareholder and made known to the corporation.

The agreement defaults to unanimous amendment and a ten-year term unless it says otherwise. Under S.D. Codified Laws § 47-1A-732.3, it ends when shares are listed on a national securities exchange or regularly traded in the specified securities market. The board may then remove the agreement and its references from the articles or bylaws without shareholder action.

What trips people up

South Dakota's direct-inspection notice is written but not expressly signed. The five-business-day signed-notice wording used in some Model Act states should not be imported here.

A higher-board-quorum or higher-board-vote bylaw carries actor-of-origin and same-or-greater-threshold safeguards. The ordinary shared-power rule is not the complete amendment answer for that bylaw.

The shareholder-agreement override ends on exchange listing or regular market trading even if its stated ten-year term has not expired.

Common questions

Must a South Dakota corporation adopt bylaws?

Yes. S.D. Codified Laws § 47-1A-206 directs the incorporators or board to adopt initial bylaws.

Can shareholders stop the board from changing a bylaw?

Generally yes under § 47-1A-1020(2), and § 47-1A-1021 adds separate protection for a higher-board-quorum or higher-board-vote bylaw.

Can the board adopt bylaws without a meeting?

Yes, unless the articles or bylaws require a meeting, but every director must sign and deliver the consent required by § 47-1A-821.

Does a shareholder need a proper purpose to inspect current bylaws?

No. Current bylaws are directly inspectable under § 47-1A-1602 after five business days' written notice.

Statutes and sources

• S.D. Codified Laws § 47-1A-101 — governing Act. Official text, accessed August 21, 2026.
• S.D. Codified Laws §§ 47-1A-205 to -207 — organization, mandatory initial adoption, contents, and emergency bylaws. Organization, bylaws, and emergency bylaws, accessed August 21, 2026.
• S.D. Codified Laws §§ 47-1A-732 to -732.3 — unanimous governance agreement, ten-year default, public-market cutoff, and board deletion authority. Agreement effect, form and term, and market cutoff, accessed August 21, 2026.
• S.D. Codified Laws §§ 47-1A-821 and -825.1(4) — delivered unanimous board consent and committee limits. Board consent and committee limits, accessed August 21, 2026.
• S.D. Codified Laws §§ 47-1A-1020 to -1021 — shared amendment power and higher-board-quorum or higher-board-vote protection. General amendment and special bylaw, accessed August 21, 2026.
• S.D. Codified Laws §§ 47-1A-1601.1 to -1602 — principal-office retention and direct shareholder inspection. Records and inspection, accessed August 21, 2026.