MCO 1040.31 governs Marine Corps career planning, reenlistment, retention, and Career Planner procedures.
View MCO 1040.31 on armypubs.army.mil
The publication covers Career Planner selection, assignment, training, interviews, uniforms, and working areas. It sets requirements for reenlistment prerequisites, waivers, service limits, extensions, retention advertising, and lateral moves.
The Career Planner will conduct an initial interview on ALL First Term Marines between 26 and 24 months prior to the Marine's ECC. (paragraph 1)
Cancellation of voluntary extension of enlistment is not authorized on or after the effective date.
The following depicts active service limits by grade. All extensions are included when computing total time for service limits.
Reenlistment is not normally approved for a period which will result in serving past the last day of the month in which the applicant will attain age 55, except where the staff noncommissioned officer has not or will not become eligible for transfer to the Fleet Marine Corps Reserve before attaining age 55. (paragraph 3)