Section 710.21 - Short title of act; Michigan adoption code(1) This act shall be known and may be cited as the "probate code of 1939".(2) This chapter shall be known and may be cited as the "Michigan adoption code".Add. 1974, Act 296, Eff. 1/1/1975 ;--Am. 1998, Act 474, Imd. Eff. 1/4/1999 .