The new law also decreed restrictions that only unmarried lieutenants of the line under the age of 30 could be detailed to the section, provisions which encouraged a lack of discipline and professional maturity among the aviators that handicapped the growth of the service, hampered retention of pilots, and prevented flying officers from commanding flying units. Officers on aviation duty who were promoted to permanent captain in their branch arm were automatically returned to the line. Aggravating the situation, the 11 remaining pilots of the 24 previously rated as Military Aviators all had their ratings automatically reduced to Junior Military Aviator (and therefore incurred a 25% reduction in flight pay) when requirements were changed to include three years experience as a JMA before qualifying for the higher rating. This placed them on the same level as newly graduated pilots, and none of those so reduced regained their ratings before 1917.