The Secretary concerned may terminate the regular appointment of any permanent regular warrant officer at any time within three years after the date when the officer accepted his original permanent appointment as a warrant officer in that component. A warrant officer who is separated under this section is entitled, if eligible therefor, to separation pay under section 1174 or he may be enlisted under . If such a warrant officer is enlisted under , he is not entitled to separation pay.section 515 of this titlesection 515 of this title