Costume Designers Branch Membership Requirements
From Academy Bylaws:
Article III, Section 1. Membership shall be by invitation of the Board of Governors. Invitations to active membership shall be limited to those persons employed by motion picture producing companies, or credited with screen achievements, or who have otherwise achieved distinction in their respective fields of endeavor within the industry and who, in the opinion of the Board, are qualified for membership.
To be considered for invitation to membership in the Costume Designers Branch of the Academy, an individual must:
(a) have at least five years experience in the motion picture industry.
and
(b) have screen credits as Costume Designer on at least four feature films of a caliber which, in the opinion of the executive committee, reflect the high standards of the Academy,
and/or
(c) have screen credit on a picture nominated for the Costume Design Award,
or
(d) have, in the judgment of the Costume Designers Branch Executive Committee, otherwise achieved unique distinction, earned special merit or made an outstanding contribution within his or her field of endeavors.
and
(e) in addition, a letter of recommendation from each of the sponsoring members is required on behalf of the candidate.