AR 614-120 governs policies and procedures for transferring commissioned and warrant officers between uniformed services.
View AR 614-120 on armypubs.army.mil
It covers transfers into and from the U.S. Army, including applications, approvals, service obligations, eligibility, and appointment procedures. It requires concurrence from the gaining and losing services and sets conditions for processing transfers.
Transfers are subject to concurrence of both the gaining and losing uniformed services. (paragraph 1-6)
No officer will be transferred without their written request or consent. (paragraph 1-6)
Applications from officers, who have been non-selected for promotion in their current grade, will not be considered. (paragraph 1)
An ADL officer who is transferred to the Army must agree to serve at least 3 years on active duty after transferring. A RASL officer must agree to serve at least 3 years of obligated service. (paragraph 2-1)
If the transfer request is approved by the CG, HRC; CCH; TJAG; TSG; and ASA (M&RA) as appropriate, but disapproved by the gaining service, then the officer concerned shall not be transferred. (paragraph 1)