Final answer:
Meritorious promotions are granted based on exceptional qualifications and performance for Marines not meeting time-in-grade requirements.
Explanation:
Meritorious promotions are used for Marines who do not yet meet the minimum time-in-grade requirement but have shown exceptional leadership and performance. These promotions are based on outstanding merit rather than longevity or regular promotions.
Learn more about Meritorious promotions in the military here:
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