In terms of the ceremony for Imperial succession, there were details in the Regulations Governing the Accession to the Throne (No.1 of Imperial Family Regulation in Meiji 42 (1909)) or 同附式 which was issued as one of the Imperial Family Regulations, what it is called '宮務法,' while the form of these regulations belong to Imperial Family Law based on the Imperial Family Law.
皇位継承の儀式については、皇室典範を根拠とし皇室典範に属する法体系、いわゆる「宮務法」として公布された皇室令のひとつ、登極令（明治42年皇室令第1号）及び同附式によって細かく定められていた。