https://www.nrotc.navy.mil/ROD/CNSTCINST1533.2.PDF
More specifically 6-31 for interservice transfers. This link is the most up-to-date instruction that most OC/MECP/MIDN should browse through
CNSTCINST 1533.2
02 Jul 07
631. Inter-service Transfers for STA-21 and MECEP Students
a. This section outlines responsibilities and procedures
for allowing STA-21 and MECEP students to receive commissions in
the Marine Corps and Navy, respectively. Both N13 and MCRC
(ON/E) must be in concurrence in order to approve all transfers.
Those seeking commissions in the Army, Air Force, or Coast Guard
should follow service-specific procedures. STA-21(N) Target
Option OC’s are ineligible for inter-service transfers.
b. The following applies to Navy STA-21 students requesting
to be commissioned in the Marine Corps:
(1) Navy STA-21 students must submit their request to
MCRC (ON/E), via NTSC OD4 not later than the end of their junior
year. The request will contain those documents and information
required by MCRC (ON/E) on which to base approval of the
requests. Requirements for commissioning in the Marine Corps
are established in MCO P1100.73;
(2) In order to receive a commission in the United
States Marine Corps, the STA-21 OC must successfully complete
Marine Corps OCS. In the event the STA-21 OC fails to complete
Marine Corps OCS, they must either fulfill their remaining STA-
21 requirements or be disenrolled. Once they successfully
complete Marine Corps OCS, the STA-21 OC should participate in
all Marine Option Naval Science instruction and meet all other
program requirements necessary to receive a commission as a
second lieutenant;
(3) When accepted by MCRC (ON/E), the student must
submit a request for separation from the Navy to BUPERS (N13) in
compliance with MILPERSMAN 1910-102; and
(4) Only highly desirable OCs will be approved for
commissioning in the Marine Corps.
c. The following applies to MECEP students requesting to be
commissioned in the Navy:
(1) Only highly desirable OCs will be approved for
commissioning. Those pursuing degrees in technical fields are
desirable.
(2) MECEP students must submit their request in writing
to OD4, via MCRC (ON/E), per the following conditions:
6-32
CNSTCINST 1533.2
02 Jul 07
(a) The application should be submitted no later
than the end of the sophomore year. This allows time for the
student to be ordered to the NSI, if required, and complete all
junior and senior level Naval Science course requirements prior
to graduation.
(b) The application shall provide information
required by OD4 on which to base a recommendation for approval,
e.g., reason for request, career goals, qualifications,
interest, etc.
(c) The application shall contain current
transcript(s) and a Degree Completion Plan.
(d) The application shall contain a statement of
understanding that the applicant, if approved for tentative
commissioning in the Navy, must complete a pre-commissioning
physical examination 18 months prior to the graduation and be
qualified for commissioning in the Navy as an unrestricted line
officer.
(e) The application shall indicate the applicant’s
first, second, and third choice of designator and whether the
applicant desires to pursue transfer if none of the choices are
approved.
(3) MECEP OCs who are approved for transfer will compete
for service selection. Requirements for commissioning in the
Navy are established in paragraphs 403-405. MECEP students
seeking a commission in the Navy will complete the same
prescribed NROTC university courses as STA-21 OCs. Additionally,
MECEP students will complete Naval Science course requirements.
d. Students will retain their status as STA-21 or MECEP
students in their original service until graduation. When
requirements for commissioning have been met, students will be
commissioned as ensigns or second lieutenants, as appropriate.
If commissioning requirements for the requested service are not
met, the individual may be retained in their original service in
a status determined by that service.
