10 U.S.C. § 572 : US Code - Section 572: Warrant officers: original appointment; service credit

Search 10 U.S.C. § 572 : US Code - Section 572: Warrant officers: original appointment; service credit

For the purposes of promotion, persons originally appointed in
regular or reserve warrant officer grades shall be credited with
such service as the Secretary concerned may prescribe. However,
such a person may not be credited with a period of service greater
than the period of active service performed in the grade, or pay
grade corresponding to the grade, in which so appointed, or in any
higher grade or pay grade.