Army age limit "raised to 42" The standard enlistment age for the U.S. Army is still 17-34. Due to recruiting shortages, the Army has expanded use of waivers, and in practice some recruits have been accepted into their late 30s or early 40s. Marijuana waiver rules (what's actually happening) 1. Past marijuana use does NOT automatically disqualify you anymore. Many cases are waiver-eligible, especially if: the use was occasional, no criminal charges, and you are able to pass the drug test now. Will you be joining the Army?