Quick search by citation:

37 U.S. Code § 1010 - Commissioned officers: promotions; effective date for pay and allowances

An officer of a uniformed service who is promoted to a grade above second lieutenant or ensign is entitled to the pay and allowances of the grade to which promoted on the effective date of the promotion.

Editorial Notes
Amendments

2006—Pub. L. 109–364 substituted “promotions” for “promotion” in section catchline.

Statutory Notes and Related Subsidiaries
Effective Date

Section effective Sept. 15, 1981, but the authority to prescribe regulations under this section effective on Dec. 12, 1980, see section 701 of Pub. L. 96–513, set out as an Effective Date of 1980 Amendment note under section 101 of Title 10, Armed Forces.