Self-elect

In the fundamental part he therefore argues: “Truly good works are not self-elected works of monastic or any other holiness, but such only as God has commanded, and as are comprehended within the bounds of one's particular calling, and all works.

Source: wiktionary

GATT Contracting Parties have self-elected their designation, most recently when the WTO was created.

Source: wiktionary

Rather than a kind of lawlessness, these chatrooms occasion the opportunity for each community to write and enforce its own rules about online conduct and self-elect its enforcers.

Source: wiktionary

In response, the CCPA began to “self-elect” bishops at the instigation of the government.

Source: wiktionary