Ye shall offer at your own will a male - Rather, That it may be accepted (so Leviticus 22:29) for you it shall be a male. See Leviticus 1:3. It is the same phrase as in Leviticus 22:20-21, Leviticus 22:27.
Related Commentaries of Leviticus 22:19
Leviticus 22:19
19 Ye shall offer at your own will a male without blemish, of the beeves, of the sheep, or of the goats.