What is the minimum time-in-service (TIS) requirement for an A1C to be promoted?

The minimum time-in-service (TIS) requirement for an Airman First Class (A1C) to be promoted is indeed 12 months. This requirement is set to ensure that service members have adequate experience and have performed their duties satisfactorily before being considered for promotion. The structure of promotions in the military is typically designed to balance the need for leadership experience with the recognition of merit and competency.

In this case, a TIS of 12 months allows A1Cs to demonstrate their abilities and establish a record of performance that can be evaluated for promotion considerations. It reflects an understanding of the developmental timeline for Airmen as they progress in their roles and responsibilities.

The other options—18 months, 24 months, and 36 months—represent longer periods that exceed the established requirement for A1Cs. These longer timeframes may apply to higher ranks or specific situations that necessitate additional experience, but for an A1C aiming for promotion, 12 months is the designated minimum.