Kuzen-an' was originally a draft proposal of kuzen, meaning no more than an incomplete version of a memorandum (memo); but later, it came into use as a means of directly conveying the imperial order to working-level officials, bypassing the Daijokan.
口宣案（くぜんあん）とは、元来は口宣の案文であり、覚書（メモ）の下書き程度の意味合いでしかなかったが、後には太政官を経由せずに直接実務担当者に勅旨の内容を伝えるために用いられた。