Ideally, charter revocation, review, and renewal should be based on the student and school performance indicators set forth in the charter document and in the state's charter laws. Since virtually all charter schools fall out of compliance with one of these four at a technical level at any given time, charter granting and oversight agencies need to use some judgement in their oversight, revocation, and renewal role.
Some state laws require a hearing or some minimal due process procedure before revoking a charter.
In states lacking such language in their legislation, charter drafters are well-advised to add one to their charter document. If a violation of the charter or law that could lead to revocation is alleged, the allegation should be formally presented to the governing board of the charter school and the school. If the school believes that the allegation is not legitimate, the sponsor agency could hold a formal or informal public hearing to review the allegation. If the allegation is found to be legitimate, the sponsor agency could direct the school to either comply with the terms of its charter or revoke the charter. This is a frustrating, but necessary, condition given the often-normative nature of charter provisions and their interpretation.